GUARANTEE AGREEMENT dated as of November 22, 2011, among VERISIGN, INC., THE OTHER GUARANTORS IDENTIFIED HEREIN and JPMORGAN CHASE BANK, N.A., as Administrative Agent TABLE OF CONTENTS

EXHIBIT 10.2

EXECUTION VERSION

GUARANTEE AGREEMENT

dated as of

November 22, 2011,

among

VERISIGN, INC.,

THE OTHER GUARANTORS IDENTIFIED HEREIN

and

JPMORGAN CHASE BANK, N.A.,

as Administrative Agent

TABLE OF CONTENTS

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GUARANTEE AGREEMENT dated as of November 22, 2011 (this “Agreement”), among VERISIGN, INC., the other GUARANTORS identified herein and JPMORGAN CHASE BANK, N.A., as Administrative Agent.

Reference is made to the Credit Agreement dated as of November 22, 2011 (as amended, supplemented or otherwise modified from time to time, the “Credit Agreement”), among VeriSign, Inc., a Delaware corporation (the “Company”), the Borrowing Subsidiaries party thereto (together with the Company, the “Borrowers”), the Lenders party thereto, JPMorgan Chase Bank, N.A., as Administrative Agent, and J.P. Morgan Europe Limited, as London Agent. The Lenders and the Issuing Banks have agreed to extend credit to the Borrowers subject to the terms and conditions set forth in the Credit Agreement. The obligations of the Lenders and the Issuing Banks to extend such credit are conditioned upon, among other things, the execution and delivery of this Agreement. The Subsidiary Guarantors are Affiliates of the Borrowers, will derive substantial benefits from the extension of credit to the Borrowers pursuant to the Credit Agreement and are willing to execute and deliver this Agreement in order to induce the Lenders and the Issuing Banks to extend such credit. Accordingly, the parties hereto agree as follows:

ARTICLE I

Definitions

SECTION 1.01. Credit Agreement. (a) Capitalized terms used in this Agreement (including in the introductory paragraph hereto) and not otherwise defined herein have the meanings specified in the Credit Agreement.

(b) The rules of construction specified in Section 1.03 of the Credit Agreement also apply to this Agreement, mutatis mutandis.

SECTION 1.02. Other Defined Terms. As used in this Agreement, the following terms have the meanings specified below:

“Agreement” has the meaning set forth in the preamble hereto.

“Borrowers” has the meaning set forth in the introductory paragraph hereto.

“Claiming Party” has the meaning set forth in Section 3.02.

“Company” has the meaning set forth in the introductory paragraph hereto.

“Contributing Party” has the meaning set forth in Section 3.02.

“Credit Agreement” has the meaning set forth in the introductory paragraph hereto.

“Guaranteed Party” means (a) the Administrative Agent, (b) the London Agent, (c) the Lenders, (d) the Issuing Banks, (e) the Arranger, (f) the beneficiaries of each indemnification obligation undertaken by any Loan Party under any Loan Document and (g) the successors and assigns of any of the foregoing.

“Guarantors” means the Company and the Subsidiary Guarantors.

“Obligations” means (a) the due and punctual payment by each Borrower of (i) the principal of and interest (including interest accruing during the pendency of any bankruptcy, insolvency, receivership or other similar proceeding, regardless of whether allowed or allowable in such proceeding) on the Loans, when and as due, whether at maturity, by acceleration, upon one or more dates set for prepayment or otherwise, (ii) each payment required to be made by such Borrower under the Credit Agreement in respect of any Letter of Credit, when and as due, including payments in respect of reimbursement of disbursements, interest thereon and obligations to provide cash collateral, and (iii) all other monetary obligations of such Borrower under the Credit Agreement and each of the other Loan Documents, including obligations to pay fees, expense reimbursement obligations and indemnification obligations, whether primary, secondary, direct, contingent, fixed or otherwise (including monetary obligations incurred during the pendency of any bankruptcy, insolvency, receivership or other similar proceeding, regardless of whether allowed or allowable in such proceeding), (b) the due and punctual performance of all other obligations of each Borrower under or pursuant to the Credit Agreement and each of the other Loan Documents, and (c) the due and punctual payment and performance of all the obligations of each other Loan Party under or pursuant to this Agreement and each of the other Loan Documents (including monetary obligations incurred during the pendency of any bankruptcy, insolvency, receivership or other similar proceeding, regardless of whether allowed or allowable in such proceeding).

“Subsidiary Guarantors” means Subsidiaries identified as such on Schedule I and each other Subsidiary that becomes a party to this Agreement as a Subsidiary Guarantor after the Effective Date pursuant to Section 5.12; provided that if a Subsidiary is released from its obligations as a Subsidiary Guarantor hereunder as provided in Section 5.12(b), such Subsidiary shall cease to be a Subsidiary Guarantor hereunder effective upon such release.

“Supplement” means an instrument in the form of Exhibit A hereto, or any other form approved by the Administrative Agent.

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ARTICLE II

The Guarantees

SECTION 2.01. Guarantee. Each Guarantor irrevocably and unconditionally guarantees, jointly with the other Guarantors and severally, the due and punctual payment and performance of the Obligations. Each Guarantor further agrees that the Obligations may be extended or renewed, in whole or in part, or amended or modified, without notice to or further assent from it, and that it will remain bound upon its guarantee hereunder notwithstanding any extension, renewal, amendment or modification of any of the Obligations. Each Guarantor waives presentment to, demand of payment from and protest to any Borrower or any other Loan Party of any of the Obligations, and also waives notice of acceptance of its Guarantee and notice of protest for nonpayment.

SECTION 2.02. Guarantee of Payment; Continuing Guarantee. Each Guarantor further agrees that its guarantee hereunder constitutes a guarantee of payment when due (whether or not any bankruptcy, insolvency, receivership or similar proceeding shall have stayed the accrual or collection of any of the Obligations or operated as a discharge thereof) and not merely of collection, and waives any right to require that any resort be had by the Administrative Agent or any other Guaranteed Party to any balance of any deposit account or credit on the books of the Administrative Agent or any other Secured Party in favor of any Borrowers, any other Loan Party or any other Person. Each Guarantor agrees that its guarantee hereunder is continuing in nature and applies to all of the Obligations, whether currently existing or hereafter incurred.

SECTION 2.03. No Limitations. (a) Except for the termination or release of a Guarantor’s obligations hereunder as expressly provided in Section 5.12, the obligations of each Guarantor hereunder shall not be subject to any reduction, limitation, impairment or termination for any reason, including any claim of waiver, release, surrender, alteration or compromise of any of the Obligations, and shall not be subject to any defense or set-off, counterclaim, recoupment or termination whatsoever by reason of the invalidity, illegality or unenforceability of any of the Obligations, any impossibility in the performance of any of the Obligations, or otherwise. Without limiting the generality of the foregoing, except for termination or release of its obligations hereunder as expressly provided in Section 5.12, the obligations of each Guarantor hereunder shall not be discharged or impaired or otherwise affected by (i) the failure of the Administrative Agent or any other Guaranteed Party to assert any claim or demand or to enforce any right or remedy under the provisions of any Loan Document or otherwise, (ii) any rescission, waiver, amendment, or modification of, or any release from any of the terms or provisions of, any Loan Document or any other agreement, including with respect to any other Guarantor under this Agreement, (iii) any default, failure or delay, wilful or otherwise, in the performance of any of the Obligations or (iv) any other act or omission that may or might in any manner or to any extent vary the risk of any Guarantor or otherwise operate as a discharge of any Guarantor as a matter of law or equity (other than the indefeasible payment in full in cash of all the Obligations).

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(b) To the fullest extent permitted by applicable law, each Guarantor waives any defense based on or arising out of any defense of any Borrower or any other Loan Party or the unenforceability of the Obligations or any part thereof from any cause, or the cessation from any cause of the liability of any Borrower or any other Loan Party (other than the indefeasible payment in full in cash of all the Obligations). The Administrative Agent and the other Guaranteed Parties may, at their election, foreclose on any security held by one or more of them by one or more judicial or nonjudicial sales, accept an assignment of any such security in lieu of foreclosure, compromise or adjust any part of the Obligations, make any other accommodation with any Borrower or any other Loan Party or exercise any other right or remedy available to them against any Borrower or any other Loan Party, without affecting or impairing in any way the liability of any Guarantor hereunder (except to the extent the Obligations have been indefeasibly paid in full in cash). To the fullest extent permitted by applicable law, each Guarantor waives any defense arising out of any such election even though such election operates, pursuant to applicable law, to impair or to extinguish any right of reimbursement or subrogation or other right or remedy of such Guarantor against any Borrower or any other Loan Party, as the case may be, or any security.

SECTION 2.04. Reinstatement. Each Guarantor agrees that its guarantee hereunder shall continue to be effective or be reinstated, as the case may be, if at any time payment, or any part thereof, of any Obligations is rescinded or must otherwise be restored by the Administrative Agent or any other Guaranteed Party upon the bankruptcy or reorganization (or any analogous proceeding in any jurisdiction) of the Company, any other Loan Party or otherwise.

SECTION 2.05. Agreement to Pay; Subrogation. In furtherance of the foregoing and not in limitation of any other right that the Administrative Agent or any other Guaranteed Party may have at law or in equity against any Guarantor by virtue hereof, upon the failure of any Borrowers or any other Loan Party to pay any Obligation when and as the same shall become due, whether at maturity, by acceleration, after notice of prepayment or otherwise, each Guarantor hereby promises to and will forthwith pay, or cause to be paid, to the Administrative Agent for distribution to the applicable Guaranteed Parties in cash the amount of such unpaid Obligation. Each Guarantor agrees that if payment in respect of any Obligation shall be due in a currency other than US Dollars and/or at a place of payment other than New York and if, by reason of any change in law, disruption of currency or foreign exchange markets, war or civil disturbance or other event, circumstance or condition, payment of such Obligation in such currency or at such place of payment shall be impossible or, in the reasonable judgment of the Administrative Agent or any Lender, not consistent with the protection of its rights or interests, then, at the election of the Administrative Agent, such Guarantor shall make payment of such Obligation in US Dollars (based upon the applicable Exchange Rate in effect on the date of payment) and/or in New York, and shall indemnify the Administrative Agent and each other Guaranteed Party against any losses or reasonable out-of-pocket expenses that it shall sustain as a result of such alternative payment. Upon payment by any Guarantor of any sums to the Administrative Agent as provided above, all rights of such Guarantor against any Borrower or any other Loan Party arising as a result thereof by way of right of subrogation, contribution, reimbursement, indemnity or otherwise shall in all respects be subject to Article III.

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SECTION 2.06. Information. Each Guarantor assumes all responsibility for being and keeping itself informed of each Borrower’s and each other Loan Party’s financial condition and assets, and of all other circumstances bearing upon the risk of nonpayment of the Obligations and the nature, scope and extent of the risks that such Guarantor assumes and incurs hereunder, and agrees that neither the Administrative Agent nor any other Guaranteed Party will have any duty to advise such Guarantor of information known to it or any of them regarding such circumstances or risks.

SECTION 2.07. Payments Free of Taxes. Each Guarantor that is not a party to the Credit Agreement hereby acknowledges the provisions of Section 2.17 of the Credit Agreement and agrees to be bound by such provisions with the same force and effect, and to the same extent, as if such Guarantor were a party to the Credit Agreement.

ARTICLE III

Indemnity, Subrogation and Subordination

SECTION 3.01. Indemnity and Subrogation. In addition to all such rights of indemnity and subrogation as the Guarantors may have under applicable law (but subject to Section 3.03), each Borrower agrees that (a) in the event a payment in respect of any Obligation of such Borrower shall be made by any Guarantor under this Agreement, such Borrower shall indemnify such Guarantor for the full amount of such payment and such Guarantor shall be subrogated to the rights of the Person to whom such payment shall have been made to the extent of such payment and (b) in the event any assets of any Guarantor shall be sold pursuant to this Agreement or any other Loan Document to satisfy in whole or in part any Obligation of such Borrower, such Borrower shall indemnify such Guarantor in an amount equal to the greater of the book value or the fair market value of the assets so sold.

SECTION 3.02. Contribution and Subrogation. Each Guarantor (a “Contributing Party”) agrees (subject to Section 3.03) that, in the event a payment shall be made by any other Guarantor (other than a payment by any Borrower of its Obligations under the Credit Agreement) hereunder in respect of any Obligations or assets of any other Guarantor (other than the Company) shall be sold pursuant to any Loan Document to satisfy any Obligation (other than any such sale of assets of any Borrower to satisfy its Obligations under the Credit Agreement) and such other Guarantor (the “Claiming Party”) shall not have been fully indemnified by the Borrowers as provided in Section 3.01, the Contributing Party shall indemnify the Claiming Party in an amount equal to the amount of such payment or the greater of the book value or the fair market value of such assets, as the case may be, in each case multiplied by a fraction of which the numerator shall be the net worth of the Contributing Party on the date hereof and the denominator shall be the aggregate net worth of all the Guarantors on the date hereof (or, in the case of any Guarantor becoming a party hereto pursuant to Section 5.12, the date of the Supplement hereto executed and delivered by such Guarantor). Any

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Contributing Party making any payment to a Claiming Party pursuant to this Section 3.02 shall (subject to Section 3.03) be subrogated to the rights of such Claiming Party under Section 3.01 to the extent of such payment.

SECTION 3.03. Subordination. Notwithstanding any provision of this Agreement to the contrary, all rights of the Guarantors under Sections 3.01 and 3.02 and all other rights of the Guarantors of indemnity, contribution or subrogation under applicable law or otherwise shall be fully subordinated to the payment in full in cash of all the Obligations. No failure on the part of any Borrower or any Guarantor to make the payments required by Sections 3.01 and 3.02 (or any other payments required under applicable law or otherwise) shall in any respect limit the obligations and liabilities of any Guarantor with respect to its obligations hereunder, and each Guarantor shall remain liable for the full amount of the obligations of such Guarantor hereunder.

ARTICLE IV

Representations and Warranties

Each Guarantor represents and warrants that (a) the execution, delivery and performance by such Guarantor of this Agreement have been duly authorized by all necessary corporate or other action and, if required, action by the holders of such Guarantor’s Equity Interests, and that this Agreement has been duly executed and delivered by such Guarantor and constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms, subject to applicable bankruptcy, insolvency, reorganization, moratorium or other laws affecting creditors’ rights generally and subject to general principles of equity, regardless of whether considered in a proceeding in equity or at law, and (b) all representations and warranties set forth in the Credit Agreement as to such Guarantor (if such Guarantor is not a party to the Credit Agreement) are true and correct.

ARTICLE V

Miscellaneous

SECTION 5.01. Notices. All communications and notices hereunder shall (except as otherwise expressly permitted herein) be in writing and given as provided in Section 9.01 of the Credit Agreement. All communications and notices hereunder to any Subsidiary Guarantor shall be given to it in care of the Company as provided in Section 9.01 of the Credit Agreement.

SECTION 5.02. Waivers; Amendment. (a) No failure or delay by any Agent, any Issuing Bank or any Lender in exercising any right or power hereunder or under any other Loan Document shall operate as a waiver thereof, nor shall any single or partial exercise of any such right or power, or any abandonment or discontinuance of steps to enforce such a right or power, preclude any other or further exercise thereof or the exercise of any other right or power. The rights and remedies of the Agents, the Issuing Banks and the Lenders hereunder and under the other Loan Documents are

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cumulative and are not exclusive of any rights or remedies that they would otherwise have. No waiver of any provision of this Agreement or consent to any departure by any Loan Party therefrom shall in any event be effective unless the same shall be permitted by paragraph (b) of this Section, and then such waiver or consent shall be effective only in the specific instance and for the specific purpose for which given. Without limiting the generality of the foregoing, the execution and delivery of this Agreement, the making of a Loan or the issuance of a Letter of Credit shall not be construed as a waiver of any Default, regardless of whether any Agent, any Issuing Bank or any Lender may have had notice or knowledge of such Default at the time. No notice or demand on any Loan Party in any case shall entitle any Loan Party to any other or further notice or demand in similar or other circumstances.

(b) Neither this Agreement nor any provision hereof may be waived, amended or modified except pursuant to an agreement or agreements in writing entered into by the Administrative Agent and the Guarantor or Guarantors with respect to which such waiver, amendment or modification is to apply, subject to any consent required in accordance with Section 9.02 of the Credit Agreement.

SECTION 5.03. Administrative Agent’s Fees and Expenses; Indemnification. (a) Each Guarantor that is not a party to the Credit Agreement, jointly with each other such Guarantor and severally, agrees to reimburse the Administrative Agent for its fees and expenses incurred hereunder as provided in Section 9.03(a) of the Credit Agreement as if each reference in such Section to “the Borrowers” were a reference to “the Guarantors” and with the same force and effect as if such Guarantor were a party to the Credit Agreement.

(b) Each Guarantor that is not a party to the Credit Agreement, jointly with each other such Guarantor and severally, agrees to indemnify and hold harmless each Indemnitee as provided in Section 9.03(b) of the Credit Agreement as if each reference in such Section to “the Borrowers” were a reference to “the Guarantors” and with the same force and effect as if such Guarantor were a party to the Credit Agreement.

(c) All amounts due under paragraph (a) or (b) of this Section shall be payable promptly after written demand therefor.

(d) To the extent permitted by applicable law, no Guarantor shall assert, or permit any of its Affiliates or Related Parties to assert, and each Guarantor hereby waives, any claim against any Indemnitee (i) for any damages arising from the use by others of information or other materials obtained through telecommunications, electronic or other information transmission systems (including the Internet), or (ii) on any theory of liability, for special, indirect, consequential or punitive damages (as opposed to direct or actual damages) arising out of, in connection with, or as a result of this Agreement, any other Loan Document or any agreement or instrument contemplated hereby or thereby, the Transactions, any Loan or Letter of Credit or the use of the proceeds thereof.

SECTION 5.04. Survival of Agreement. All covenants, agreements, representations and warranties made by the Loan Parties in the Loan Documents and in

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the certificates or other instruments delivered in connection with or pursuant to this Agreement or any other Loan Document shall be considered to have been relied upon by the Agents, the Arranger, the Issuing Banks and the Lenders and shall survive the execution and delivery of the Loan Documents and the making of any Loans and issuance of any Letters of Credit, regardless of any investigation made by any such Person or on its behalf and notwithstanding that any Agent, the Arranger, any Issuing Bank or any Lender may have had notice or knowledge of any Default or incorrect representation or warranty at the time any Loan Document is executed and delivered or any credit is extended under the Credit Agreement, and, subject to Section 9.05 of the Credit Agreement, shall continue in full force and effect as long as the principal of or any accrued interest on any Loan or any fee or any other amount payable under the Credit Agreement is outstanding and unpaid or any LC Exposure is outstanding and so long as the Commitments have not expired or terminated. The provisions of Sections 2.04, 2.07 and 5.03 shall survive and remain in full force and effect regardless of the consummation of the transactions contemplated by the Loan Documents, the repayment of the Loans, the expiration or termination of the Letters of Credit and the Commitments or the termination of this Agreement or any provision hereof.

SECTION 5.05. Counterparts; Effectiveness; Several Agreement. This Agreement may be executed in counterparts (and by different parties hereto on different counterparts), each of which shall constitute an original but all of which when taken together shall constitute a single contract. Delivery of an executed counterpart of a signature page of this Agreement by facsimile or other electronic imaging shall be effective as delivery of a manually signed counterpart of this Agreement. This Agreement shall become effective as to any Guarantor when a counterpart hereof executed on behalf of such Guarantor shall have been delivered to the Administrative Agent and a counterpart hereof shall have been executed on behalf of the Administrative Agent, and thereafter shall be binding upon such Guarantor and the Administrative Agent and their respective permitted successors and assigns, and shall inure to the benefit of such Guarantor, the Administrative Agent and the other Guaranteed Parties and their respective successors and assigns, except that no Guarantor shall have the right to assign or transfer its rights or obligations hereunder or any interest herein (and any attempted assignment or transfer by any Loan Party shall be null and void), except as expressly provided in this Agreement and the Credit Agreement. This Agreement shall be construed as a separate agreement with respect to each Guarantor and may be amended, modified, supplemented, waived or released with respect to any Guarantor without the approval of any other Guarantor and without affecting the obligations of any other Guarantor hereunder.

SECTION 5.06. Severability. To the fullest extent permitted by applicable law, any provision of this Agreement held to be invalid, illegal or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such invalidity, illegality or unenforceability without affecting the validity, legality and enforceability of the remaining provisions hereof; and, to the fullest extent permitted by applicable law, the invalidity of a particular provision in a particular jurisdiction shall not invalidate such provision in any other jurisdiction.

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SECTION 5.07. Right of Set-Off. If an Event of Default shall have occurred and be continuing, each Lender and Issuing Bank, and each Affiliate of any of the foregoing, is hereby authorized at any time and from time to time, to the fullest extent permitted by applicable law, to set off and apply any and all deposits (general or special, time or demand, provisional or final, in whatever currency) or other amounts at any time held and other obligations (in whatever currency) at any time owing by such Lender or Issuing Bank, or by such an Affiliate, to or for the credit or the account of any Guarantor against any of and all the obligations then due of such Guarantor now or hereafter existing under this Agreement held by such Lender or Issuing Bank, irrespective of whether or not such Lender or Issuing Bank shall have made any demand under this Agreement. The rights of each Lender and Issuing Bank, and each Affiliate of any of the foregoing, under this Section are in addition to other rights and remedies (including other rights of setoff) that such Lender, Issuing Bank or Affiliate may have.

SECTION 5.08. Governing Law; Jurisdiction; Consent to Service of Process; Appointment of Service of Process Agent. (a) This Agreement shall be construed in accordance with and governed by the law of the State of New York.

(b) Each party hereto hereby irrevocably and unconditionally submits, for itself and its property, to the jurisdiction of the Supreme Court of the State of New York sitting in New York County and of the United States District Court of the Southern District of New York, and any appellate court from any thereof, in any action or proceeding arising out of or relating to this Agreement or any other Loan Document, or for recognition or enforcement of any judgment, and each Guarantor hereby irrevocably and unconditionally agrees that all claims in respect of any such action or proceeding brought by it or any of its Affiliates shall be brought, and shall be heard and determined, exclusively in such New York State or, to the extent permitted by law, in such Federal court. Each of the parties hereto agrees that a final judgment in any such action or proceeding shall be conclusive and may be enforced in other jurisdictions by suit on the judgment or in any other manner provided by law. Nothing in this Agreement or any other Loan Document shall affect any right that the Administrative Agent, any Issuing Bank or any Lender may otherwise have to bring any action or proceeding relating to this Agreement or any other Loan Document against any Guarantor or any of its properties in the courts of any jurisdiction.

(c) Each Guarantor hereby irrevocably and unconditionally waives, to the fullest extent permitted by law, any objection that it may now or hereafter have to the laying of venue of any suit, action or proceeding arising out of or relating to this Agreement or any other Loan Document in any court referred to in paragraph (b) of this Section. Each of the parties hereto hereby irrevocably waives, to the fullest extent permitted by law, the defense of an inconvenient forum to the maintenance of such action or proceeding in any such court.

(d) Each party hereto irrevocably consents to service of process in the manner provided for notices in Section 5.01. Nothing in this Agreement or any other Loan Document will affect the right of any party to this Agreement or any other Loan Document to serve process in any other manner permitted by law.

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SECTION 5.09. WAIVER OF JURY TRIAL. EACH PARTY HERETO HEREBY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT, ANY OTHER LOAN DOCUMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY). EACH PARTY HERETO (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION.

SECTION 5.10. Headings. Article and Section headings and the Table of Contents used herein are for convenience of reference only, are not part of this Agreement and shall not affect the construction of, or be taken into consideration in interpreting, this Agreement.

SECTION 5.11. Termination or Release. (a) Subject to Section 2.04, this Agreement and the Guarantees made herein shall terminate and be released when all the Obligations (other than contingent obligations for indemnification, expense reimbursement, tax gross-up or yield protection as to which no claim has been made) have been paid in full in cash, the Lenders have no further commitment to lend under the Credit Agreement, the LC Exposure has been reduced to zero (including as a result of obtaining consent of the applicable Issuing Bank as described in Section 9.05 of the Credit Agreement) and the Issuing Banks have no further obligations to issue, amend or extend Letters of Credit under the Credit Agreement.

(b) The Guarantees made herein by a Subsidiary Loan Party shall also be released at the time or times and in the manner set forth in Section 9.18 of the Credit Agreement.

(c) In connection with any termination or release pursuant to paragraph (a) or (b) of this Section, the Administrative Agent shall execute and deliver to any Guarantor, at such Guarantor’s expense, all documents that such Guarantor shall reasonably request to evidence such termination or release. Any execution and delivery of documents by the Administrative Agent pursuant to this Section shall be without recourse to or warranty by the Administrative Agent.

SECTION 5.12. Additional Subsidiary Guarantors. Pursuant to the Credit Agreement, certain Subsidiaries not a party hereto on the Effective Date are required to enter into this Agreement. Upon the execution and delivery by the Administrative Agent and any such Subsidiary of a Supplement, such Subsidiary shall become a Subsidiary Guarantor hereunder with the same force and effect as if originally named as such herein. The execution and delivery of any Supplement shall not require the consent of any other

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Guarantor hereunder. The rights and obligations of each Guarantor hereunder shall remain in full force and effect notwithstanding the addition of any new Subsidiary as a party to this Agreement.

SECTION 5.13. Conversion of Currencies. (a) If, for the purpose of obtaining judgment in any court, it is necessary to convert any Obligation denominated in one currency into another currency, each party hereto agrees, to the fullest extent that it may effectively do so, that the rate of exchange used shall be that at which in accordance with normal banking procedures in the relevant jurisdiction the first currency could be purchased with such other currency on the Business Day immediately preceding the day on which final judgment is given.

(b) The obligations of each Guarantor in respect of any Obligation due to any Guaranteed Party shall, notwithstanding any judgment in a currency (the “Judgment Currency”) other than the currency in which such Obligation is stated to be due under the Loan Documents (the “Agreement Currency”), be discharged only to the extent that, on the Business Day following receipt by such Guaranteed Party of any sum adjudged to be so due in the Judgment Currency, such Guaranteed Party may in accordance with normal banking procedures in the relevant jurisdiction purchase the Agreement Currency with the Judgment Currency; if the amount of the Agreement Currency so purchased is less than the sum originally due to such Guaranteed Party in the Agreement Currency, such Guarantor agrees, as a separate obligation and notwithstanding any such judgment, to indemnify such Guaranteed Party against such loss.

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IN WITNESS WHEREOF, the parties hereto have duly executed this Guarantee Agreement as of the day and year first above written.

SIGNATURE PAGE TO GUARANTEE AGREEMENT

SIGNATURE PAGE TO GUARANTEE AGREEMENT

Schedule I to

the Guarantee Agreement

INITIAL SUBSIDIARY GUARANTORS

1. VeriSign Information Services, Inc.

Exhibit A to

the Master Guarantee Agreement

SUPPLEMENT NO.      dated as of [    ] to the Guarantee Agreement dated as of [            ], 2011, among VERISIGN, INC., the other GUARANTORS party thereto and JPMORGAN CHASE BANK, N.A., as Administrative Agent.

Reference is made to (a) the Credit Agreement dated as of November 22, 2011 (as amended, supplemented or otherwise modified from time to time, the “Credit Agreement”), among VeriSign, Inc., a Delaware corporation (the “Company”), the Borrowing Subsidiaries party thereto, the Lenders party thereto, JPMorgan Chase Bank, N.A., as Administrative Agent, and J.P. Morgan Europe Limited, as London Agent, and (b) the Guarantee Agreement dated as of November 22, 2011 (as amended, supplemented or otherwise modified from time to time, the “Guarantee Agreement”), among the Company, the other Guarantors party thereto and JPMorgan Chase Bank, N.A., as Administrative Agent. Capitalized terms used herein and not otherwise defined herein shall have the meanings assigned to such terms in the Credit Agreement or the Guarantee Agreement, as applicable.

The Guarantors have entered into the Guarantee Agreement in order to induce the Lenders and the Issuing Banks to extend credit to the Borrowers. Section 5.12 of the Guarantee Agreement provides that additional Subsidiaries may become Guarantors under the Guarantee Agreement by execution and delivery of an instrument in the form of this Supplement. The undersigned Subsidiary (the “New Subsidiary”) is executing this Supplement to become a Guarantor under the Guarantee Agreement in order to induce the Lenders and the Issuing Banks to make additional extensions of credit under the Credit Agreement and as consideration for such extensions of credit previously issued.

Accordingly, the Administrative Agent and the New Subsidiary agree as follows:

SECTION 1. In accordance with Section 5.12 of the Guarantee Agreement, the New Subsidiary by its signature below becomes a Guarantor under the Guarantee Agreement with the same force and effect as if originally named therein as a Subsidiary Guarantor, and the New Subsidiary hereby agrees to all the terms and provisions of the Guarantee Agreement applicable to it as a Subsidiary Guarantor thereunder. Each reference to a “Subsidiary Guarantor” or a “Guarantor” in the Guarantee Agreement shall be deemed to include the New Subsidiary. The Guarantee Agreement is hereby incorporated herein by reference.

SECTION 2. The New Subsidiary represents and warrants that (a) the execution, delivery and performance by the New Subsidiary of this Supplement have been duly authorized by all necessary corporate or other action and, if required, action by the holders of the New Subsidiary’s Equity Interests, and that this Supplement has been duly executed and delivered by the New Subsidiary and constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms, subject to

applicable bankruptcy, insolvency, reorganization, moratorium or other laws affecting creditors’ rights generally and subject to general principles of equity, regardless of whether considered in a proceeding in equity or at law, and (b) all representations and warranties set forth in the Credit Agreement as to the New Subsidiary are true and correct.

SECTION 3. This Supplement may be executed in counterparts (and by different parties hereto on different counterparts), each of which shall constitute an original but all of which when taken together shall constitute a single contract. Delivery of an executed signature page to this Supplement by facsimile or other electronic imaging shall be effective as delivery of a manually signed counterpart of this Supplement. This Supplement shall become effective as to the New Subsidiary when a counterpart hereof executed on behalf of the New Subsidiary shall have been delivered to the Administrative Agent and a counterpart hereof shall have been executed on behalf of the Administrative Agent, and thereafter shall be binding upon the New Subsidiary and the Administrative Agent and their respective permitted successors and assigns, and shall inure to the benefit of the New Subsidiary, the Administrative Agent, the other Guaranteed Parties and their respective successors and assigns, except that the New Subsidiary shall not have the right to assign or transfer its rights or obligations hereunder or any interest herein (and any such assignment or transfer shall be void) except as expressly provided in this Supplement, the Guarantee Agreement and the Credit Agreement.

SECTION 4. Except as expressly supplemented hereby, the Guarantee Agreement shall remain in full force and effect.

SECTION 5. THIS SUPPLEMENT SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE STATE OF NEW YORK.

SECTION 6. To the fullest extent permitted by applicable law, any provision of this Supplement held to be invalid, illegal or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such invalidity, illegality or unenforceability without affecting the validity, legality and enforceability of the remaining provisions hereof; and to the fullest extent permitted by applicable law, the invalidity of a particular provision in a particular jurisdiction shall not invalidate such provision in any other jurisdiction.

SECTION 7. All communications and notices hereunder shall be in writing and given as provided in Section 5.01 of the Guarantee Agreement.

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IN WITNESS WHEREOF, the New Subsidiary and the Administrative Agent have duly executed this Supplement to the Guarantee Agreement as of the day and year first above written.

SIGNATURE PAGE TO SUPPLEMENT TO THE GUARANTEE AGREEMENT