Document:

<PAGE>
                                                                   Exhibit 10.22

          Confidential Materials omitted and filed separately with the
         Securities and Exchange Commission. Asterisks denote omissions.

TENTH AMENDMENT TO PROGRESS SOFTWARE APPLICATION PARTNER AGREEMENT

This TENTH AMENDMENT to the Progress Software Corporation Application Partner
Agreement is effective as of the 30th day of November 2004 ("Effective Date"),
by and between Progress Software Corporation, a Massachusetts corporation with
its principal place of business at 14 Oak Park, Bedford, Massachusetts 01730
("PSC") and RSA Security Inc., a Delaware corporation with its principal place
of business at 174 Middlesex Turnpike, Bedford, Massachusetts 01730 ("RSA").

WHEREAS, PSC and RSA entered into a Progress Software Application Partner
Agreement effective as of December 5, 1994 ("Agreement");

WHEREAS, PSC and RSA previously amended the Agreement by entering into an
addendum to the Agreement effective December 5, 1994 ("Addendum") and a
subsequent amendment to the Agreement dated October 19, 1995 ("First
Amendment");

WHEREAS, PSC and RSA entered into a second amendment to the Agreement effective
November 29, 1995 ("Second Amendment") which completely superseded the terms and
conditions of the Addendum and Amendment;

WHEREAS, PSC and RSA entered into a third amendment to the Agreement effective
November15, 1996 ("Third Amendment") which supersedes Attachment A in the Second
Amendment with a new Attachment A in the Third Amendment;

WHEREAS, PSC and RSA entered into a fourth amendment to the Agreement effective
April 1, 1998 ("Fourth Amendment");

WHEREAS, PSC and RSA entered into a fifth amendment to the Agreement effective
February 18, 1999 ("Fifth Amendment");

WHEREAS, PSC and RSA entered into a sixth amendment to the Agreement effective
October 26, 1999 ("Sixth Amendment");

WHEREAS, PSC and RSA entered into a seventh amendment to the Agreement effective
November 28, 2001 ("Seventh Amendment");

WHEREAS, PSC and RSA entered into an eighth amendment to the Agreement effective
November 27, 2002 ("Eighth Amendment") which supersedes the Seventh Amendment in
its entirety;

WHEREAS, PSC and RSA entered into a ninth amendment to the Agreement effective
December 2, 2003 ("Ninth Amendment"); and

WHEREAS, PSC and RSA desire to further amend the terms and conditions to
terminate and render null and void all prior amendments to the Agreement
excepting therefrom Sections 1-10 of the Second Amendment, Sections 1-5 (but not
including the final paragraph of Section 2B) of the Third Amendment and the
entire Ninth Amendment, and to add an annual commitment for the period of
October 1, 2004 through September 30, 2005 and reflect product name changes.

<PAGE>

NOW, THEREFORE, for good and valuable consideration, the receipt and adequacy of
which are hereby acknowledged, the parties hereto agree as follows:

1.   The parties acknowledge and agree that all prior amendments to the
     Agreement, other than Sections 1-10 of the Second Amendment, Sections 1-5
     (but not including the final paragraph of Section 2B, which paragraph shall
     be null and void) of the Third Amendment and the entire Ninth Amendment are
     hereby rendered null and void without further force or effect. The parties
     further acknowledge and agree that pre-paid royalties shall not apply to
     this Tenth Amendment.

2.   The following definitions shall apply to the terms of this Tenth Amendment:

     a.   Net License Fee" shall mean the total license fee (not including fees
          for support and maintenance services) charged by RSA to each Customer
          for the Application Module bundled with the Selected PSC Product, less
          all discounts, sales tax and shipping fees, but including any license
          fee that RSA charges Customer for an Upgrade or Update.

     b.   Net Maintenance Fee" shall mean the total maintenance fee (not
          including license fees) charged by RSA to each Customer for support
          and maintenance services with respect to the Application Module
          bundled with the Selected PSC Product, less all discounts, sales tax
          and shipping fees.

     c.   "Selected PSC Product" shall mean the PSC product(s) listed in the
          attached Exhibit A.

     d.   "Application Module" shall mean any RSA application software module
          described in Exhibit B to this Tenth Amendment that incorporates or is
          bundled with any portion of a Selected PSC Product.

     e.   "Upgrade or Update" shall mean any upgrade or update to an Application
          Module and/or Selected PSC Product where RSA charges the Customer an
          additional license fee for such upgrade or update.

     f.   "Customer(s)" shall mean a third party licensed by RSA to use an
          Application Module solely in accordance with RSA's End User License
          Agreement (set forth as Exhibit C to this Tenth Amendment) entered
          into between RSA and Customer.

3.   Product Royalties. RSA shall pay PSC a royalty equal to [**] percent
     ([**]%) of the Net License Fee for each copy of the Application Module
     licensed to a Customer (the "Product Royalty"). For Customers who add
     additional users to their existing installations but do not add additional
     Application Modules, RSA will charge such Customers a user count increase
     fee to be determined solely by RSA (the "Additional User Fee"). RSA shall
     pay PSC [**] percent ([**]%) of the Additional User Fee.

     a.   RSA agrees not to disproportionately charge more for non-license or
          maintenance fees and less for royalty generating license and
          maintenance fees, thus resulting in lower royalties to PSC than would
          otherwise customarily be due.

     b.   If, during the term hereof, RSA develops a product, other than those
          listed on Exhibit B attached hereto, that directly accesses a database
          created by a Selected PSC Product other than through the Application
          Module, RSA will so notify PSC

<PAGE>

          and the parties will negotiate in good faith an applicable royalty to
          be paid to PSC for each copy of such RSA product distributed by RSA.

4.   Maintenance Royalties.

     a.   First Year Maintenance. RSA will receive PSC's generally available
          basic level support and maintenance services, as described in PSC's
          Worldwide Products, Policies, & Configurations Guide current as of the
          date maintenance is requested, only for Customers for whom RSA has
          paid PSC Product Royalties and either New Maintenance Royalties or
          Annual Maintenance Royalty, as applicable. Notwithstanding the
          foregoing, the technical support terms reflected in Section 2 of the
          Ninth Amendment shall apply for the term provided in Section 2 of the
          Ninth Amendment. RSA shall pay PSC a royalty equal to [**] percent
          ([**]%) of the Net Maintenance Fee per Application Module per annum
          (the "New Maintenance Royalty") only for Customers who are purchasing
          maintenance for the Application Module for the first time. RSA has no
          obligation to pay a New Maintenance Royalty for Customers who are
          renewing their maintenance contracts; renewal maintenance royalties
          are set forth in Section 4(b) below.

     b.   Renewal Maintenance. RSA shall pay PSC an Annual Maintenance Royalty
          for each renewal of an annual maintenance term. The Annual Maintenance
          Royalty for renewal maintenance for the period of October 1, 2004
          through September 30, 2005 shall be $[**] payable as follows:

               $[**] on or before January 31, 2005;
               $[**] on or before April 29, 2005;
               $[**] on or before July 29, 2005; and
               $[**] on or before October 31, 2005.

          The Annual Maintenance Royalty for renewal maintenance for the period
          of October 1, 2005 through September 30, 2006 shall be determined on
          October 1, 2005 based on the following table ("Total Annual
          Maintenance Royalty"). Payments equal to one-quarter of the Total
          Annual Maintenance Royalty shall be made on or before the end of
          January, April, July and October, 2006.

          Number of Application Modules
          Receiving Maintenance from RSA
          Total Annual
          Maintenance Royalty as of 10/1/05
          ---------------------------------
          0-11,200                                     $[**]
          11,201-12,000                                $[**]
          12,001 - 13,000                              $[**]
          13,001-14,500                                $[**]
          14,501+                                      $[**]

          Notwithstanding the foregoing, in the event a Customer allows its
          maintenance to lapse and RSA charges such Customer a premium or
          penalty for reinstatement of

<PAGE>

          maintenance, RSA shall pay PSC [**] percent ([**]%) of any such
          premium collected by RSA.

5.   Annual Commitment. RSA commits to paying PSC $[**] in aggregate Product
     Royalties, New Maintenance Royalties and Annual Maintenance Royalty
     (collectively, "Royalties") during the twelve (12) months beginning October
     1, 2004. The parties acknowledge and agree that any payments due and/or
     paid to PSC resulting from distribution of the Application Module prior to
     October 1, 2004 shall not be counted towards the annual commitment of
     $[**]. If RSA fails to meet its annual commitment of $[**], RSA shall pay
     PSC the difference between the actual amount paid in aggregate Royalties
     during the period October 1, 2004 through September 30, 2005 and $[**].
     Such payment, if any, shall be payable on or before November 30, 2005.

     The parties may adjust the annual commitment for the period of October 1,
     2005 through September 30, 2006 by mutual written agreement. If PSC
     determines that no adjustment to the annual commitment is necessary, the
     annual commitment for the period of October 1, 2005 through September 30,
     2006 shall be $[**]. The parties acknowledge and agree that any payments
     due and/or paid to PSC resulting from distribution of the Application
     Module prior to October 1, 2005 shall not be counted towards this annual
     commitment of $[**] (as may be adjusted as provided herein). If RSA fails
     to meet this annual commitment of $[**], RSA shall pay PSC the difference
     between the actual amount paid in aggregate Royalties during the period
     October 1, 2005 through September 30, 2006 and $[**] (as may be adjusted as
     provided herein). Such payment, if any, shall be payable on or before
     November 30, 2006.

6.   RSA shall provide the following reports to PSC on a quarterly basis:

     An Application Module Royalty and Maintenance Report including for each
     Application Module(s) licensed to a Customer, or for each additional
     Application Module, Upgrade or Update: the Customer name, maintenance dates
     (start date and end date), Net License Fee, Net Maintenance Fee, and
     Product and New Maintenance Royalty. Such report shall be provided to PSC
     on the fifteenth business day of January, April, July and October and shall
     be sent to:

          Customer Service, Progress Software Corporation, 14 Oak Park, Bedford,
          MA 01730; Fax# 781-275-4593, or such other individual as may be
          designated by PSC with a copy to: Director of Business Operations,
          Progress Software Corporation, 14 Oak Park, Bedford, MA 01730; Fax #
          781-275-4593.

     PSC shall keep such report confidential. RSA shall include with its report
     payment of all Product and Maintenance Royalties for all Application
     Modules, Upgrades or Updates listed in such report.

7.   PSC agrees to provide RSA, during the term of this Tenth Amendment, with
     five (5) PSDN license at no charge provided RSA agrees to the terms and
     conditions of the applicable PSC PSDN End User Product License Agreement.
     Additional PSDN licenses shall be available to RSA at PSC's list price and
     terms and conditions at the time the PSDN licenses are purchased.

8.   The parties agree that the end user license agreement attached to the Third
     Amendment is hereby replaced with RSA's current End User Product License
     Agreement attached hereto as Exhibit C. RSA agrees to enter into license
     agreements with its Customers that contain terms and conditions
     substantially in accordance with those contained in such

<PAGE>

     end user license agreement. However, RSA acknowledges that Progress
     versions 9.0 and above may contain third party technology that requires
     additional terms in the end user license agreement. PSC shall make such
     additional terms available to RSA, and RSA shall incorporate substantially
     similar terms into its end user license agreement for its Progress-based
     applications.

9.   Section 2 of the Ninth Amendment is amended by deleting "Progress V9.1d"
     each time it appears and replacing it with "Progress V9.1e."

10.  The term of this Agreement, including without limitation shall expire on
     November 30, 2006, unless earlier terminated as provided in the Agreement,
     as amended. The parties may renew the Agreement upon mutual written
     consent.

Except as specifically modified or amended by this Tenth Amendment, the terms
and conditions of the Agreement, as amended, shall remain in full force and
effect. No other modifications or additions are made to the Agreement. In the
event of any conflict between the terms and conditions of this Tenth Amendment
and the Agreement as amended, the terms and conditions of this Tenth Amendment
shall take precedence over the Agreement and the previous Amendments thereto.

                [REMAINDER OF PAGE IS INTENTIONALLY LEFT BLANK.]

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IN WITNESS WHEREOF, this Tenth Amendment has been executed on behalf of each of
the parties hereto by their duly authorized representative as of the date first
set forth above.

RSA Security Inc.                                Progress Software Corporation

By: /s/ Jeffrey D. Glidden                       By: /s/ David G. Ireland
    -------------------------                        -------------------------

Name: Jeffrey D. Glidden                         Name: David G. Ireland

Title: SVP & CFO                                 Title: President

<PAGE>

EXHIBIT A: Selected PSC Products

Progress v9 products on all Progress supported platforms

<PAGE>

EXHIBIT B: Application Module

RSA Authentication Manager

<PAGE>

EXHIBIT C: RSA Security End User License Agreement

This is a legal agreement ("the Agreement") between the end user ("You") and RSA
Security Inc. ("RSA"). This Agreement may be superseded by (a) any written
agreement signed by both You and RSA or (b) any written evaluation license
included with the RSA Software (defined below). This Agreement is a part of the
software being installed, downloaded, copied or otherwise used.

1.   DEFINITIONS:

"AUTHORIZED RESELLER" means one or more solution providers, service providers,
value-added resellers or other distributors or resellers who market, demonstrate
and arrange for licensing of RSA Products on behalf of RSA.

"DOCUMENTATION" means the manuals, handbooks, and other written materials
related to the use of the RSA Software and RSA SecurID(R) Authenticators whether
in hard copy or soft copy form, that are provided by RSA and that customarily
accompany the RSA Software and RSA SecurID(R) Authenticators.

"RSA PRODUCTS" mean the RSA Software, Documentation and RSA SecurID
Authenticators provided under this Agreement.

"RSA SECURID(R) AUTHENTICATORS" mean the hardware cards and/or tokens purchased
by You from RSA and used by You to authenticate into certain RSA Software.

"RSA SOFTWARE" means RSA's proprietary software licensed to You by RSA,
including, without limitation, firmware incorporated in an RSA SecurID(R)
Authenticators, consisting of a series of instructions or statements in
machine-readable, object code form only, and all modifications made thereto by
RSA.

2.   GRANT OF LICENSE.

(A) GRANT OF LICENSE FOR RSA SOFTWARE.

     (1) License Grant. RSA hereby grants, and You hereby accept, a perpetual
(unless terminated as set forth in Section 6), non-exclusive, non-transferable
license to use the RSA Software, in accordance with the instructions contained
in the Documentation. As set forth in a writing from RSA to You, Your license
grant may be limited with respect to the number of users, servers, asserting and
relying parties and/or functionality options. RSA shall convey such limitations
in one of the following: Your purchase order for such RSA Products, Your
corresponding RSA or RSA-authorized sales quotation or invoice, or an RSA user
license certificate that accompanies the RSA Products. You may make copies of
the RSA Software for backup, testing, disaster recovery or archival purposes
only and may make a reasonable number of copies of the Documentation for Your
internal use only, provided that You also reproduce on such copies any
copyright, trademark or other proprietary markings and notices contained on the
RSA Software and Documentation and do not remove any such marks from the
original.

     (2) Restrictions on License Grant. Notwithstanding the license grant set
forth above, if You are using RSA(R) Certificate Manager (a/k/a RSA Keon(R)
Certificate Authority) software ("Certificate Manager Software") as bundled with
RSA(R) Access Manager (a/k/a RSA ClearTrust(R)) software ("Access Manager
Software") or RSA(R) Federated Identity Manager software ("FIM Software"), then
You may use the Certificate Manager Software (a) solely for the purpose of
further enabling inter-component security in the Access Manager Software
environment or FIM Software environment, as the case may be, and (b) are limited
to issuing and managing up to fifty (50) certificates between the server
components within the Access Manager Software environment or FIM Software
environment, as the case may be, to provide authenticated SSL communications
among such components. You must purchase a separate license for the Certificate
Manager Software if you wish to use to use more than fifty (50) certificates or
the software for any other purpose.

(B) LIMITATIONS ON LICENSE GRANT FOR RSA SOFTWARE. You shall not cause or permit
(i) access (except to Your employees, agents and consultants with a "need to
know" who are bound, in writing, by obligations of non-disclosure that protect
RSA's interests in the RSA Software but no less restrictive than Your
obligations herein), (ii) copying (except as set forth in Section 2(A)(1)
herein), (iii) sublicensing or other dissemination to any third party of the RSA
Software, in whole or in part, without the prior written consent of RSA. You may
not use any third-party software embedded in or bundled with the RSA Software as
a standalone program or in any way independently from the RSA Software provided
by RSA to You. To the extent that the RSA Software contains or is bundled with
third party software or other proprietary RSA software, You may use such third
party software and/or other proprietary RSA software solely for the purpose such
software is

<PAGE>

included with the RSA Software and only for use with the particular RSA Software
that You have licensed from RSA as set forth in the applicable Documentation.
You shall not modify, enhance, translate, supplement, create derivative works
from, reverse engineer, reverse compile or otherwise reduce the RSA Software to
human readable form without the prior written consent of RSA.

(C) RESTRICTION ON USE OF RSA SECURID AUTHENTICATORS. You may only use the RSA
SecurID Authenticators to authenticate to RSA Software. You shall not use any
hardware cards, tokens or other devices not provided by RSA to authenticate to
the RSA Software, unless otherwise authorized by RSA in writing prior to such
use.

3.   OWNERSHIP AND COPYRIGHT. RSA or its suppliers own the RSA Software and
Documentation. All RSA Software and Documentation (including revisions,
modifications and enhancements thereto) and any other specifications,
documentation, ideas, know-how, techniques, processes, inventions or other
intellectual property that may be developed, conceived and/or delivered by RSA
under this Agreement, including all patents, copyrights and other intellectual
property rights thereto, (collectively "RSA Property") shall be the sole and
exclusive property of RSA or its suppliers, as applicable, and shall only be
used by You as authorized herein. Such RSA Property is protected by patent and
copyright laws and international treaty provisions, and RSA intends that You
will use such RSA Property only in accordance with the terms and conditions of
this Agreement.

You shall acquire no rights of any kind in or to any RSA trademark, service
mark, trade name, logo or product designation under which the RSA Products were
or are marketed and shall not make any use of the same for any reason except as
expressly authorized by this Agreement or otherwise authorized in writing by RSA
prior to such use. You shall cease to use permitted markings, or any similar
markings, in any manner on the expiration or termination of this Agreement.

4.   LIMITED WARRANTY.

(A) RSA SOFTWARE WARRANTY. RSA warrants that the RSA Software will operate in
material conformance to RSA's published specifications for such RSA Software
during the first 90 days following Your initial receipt of the RSA Software (the
"Warranty Period"). RSA does not warrant, however, that the RSA Software or any
portion thereof is error-free. If You discover a non-conformity in the RSA
Software during the Warranty Period, You shall submit to RSA (or the Authorized
Reseller from which You licensed the RSA Software) a written report describing
the non-conformity in sufficient detail to enable RSA to reproduce such
non-conformity. Upon confirmation that the reported non-conformity has been
reproduced and confirmed to be such, RSA will use reasonable efforts to, at its
option, (i) correct the non-conformity; (ii) provide a work around or software
patch (collectively "Fixes"); or (iii) replace the RSA Software. If RSA
determines that none of these alternatives is reasonably available, then upon
Your request, RSA shall refund any pre-payments made by You for the affected RSA
Software and accept its return. All Fixes provided by RSA shall constitute RSA
Software hereunder, as applicable, and shall be governed by the terms hereof.
This warranty shall not apply to any non-conformity caused by any unauthorized
modification to the RSA Software or by Your failure to incorporate any Fixes
provided or made available by RSA. This warranty applies only to the initial
delivery of the RSA Software. Fixes are provided with a limited warranty of 30
days from receipt of such Fix or for the remainder of the initial Warranty
Period, whichever is greater.

(B) RSA SECURID AUTHENTICATOR WARRANTY. RSA warrants that each RSA SecurID
Authenticator purchased from RSA or an Authorized Reseller will perform in
material conformance to RSA's specifications in the Documentation for the
purchased life of such RSA SecurID Authenticator as set forth on the invoice
submitted to You by RSA.

(C) LIMITATIONS OF WARRANTY. The foregoing warranties shall not apply if (i)
repair or replacement is required as a result of causes other than normal use,
including, without limitation, repair, maintenance or modification of the RSA
Products by persons other than personnel authorized by RSA; Your accident, fault
or negligence; operator error; use of the RSA Products other than as set forth
in the Documentation; or causes external to the RSA Products such as, but not
limited to, failure of electrical power or fire or water damage; or (ii) the RSA
Products are used with software or equipment other than that for which they were
designed as set forth in the Documentation.

(D) WARRANTY DISCLAIMER. THE FOREGOING EXPRESS WARRANTIES ARE IN LIEU OF ALL
LIABILITIES OR OBLIGATIONS ON THE PART OF RSA. OTHER THAN THE EXPRESS WARRANTIES
MADE BY RSA AS SET FORTH IN THIS SECTION 4, RSA AND ITS SUPPLIERS DISCLAIM ALL
WARRANTIES AS TO ANY MATTER WHATSOEVER, EITHER EXPRESS OR IMPLIED, (INCLUDING,

<PAGE>

WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE). YOUR SOLE REMEDY FOR BREACH OF SUCH
EXPRESS LIMITED WARRANTIES SHALL BE A CORRECTION, FIX OR REFUND AS SET FORTH IN
THIS SECTION 4.

This warranty gives You specific legal rights. As some jurisdictions do not
allow the exclusion of implied conditions or warranties, statutory or otherwise,
the above exclusion may not apply to you, and You may also have other rights
that vary from jurisdiction to jurisdiction.

You shall direct any and all related warranty issues and subsequent support
issues to the party that You licensed or purchased the RSA Products from,
unless, in the case of support matters, You have entered into a separate support
service contract directly with RSA.

You UNDERSTAND THAT, IF you PURCHASED THis PACKAGE FROM AN AUTHORIZED RESELLER
OF RSA, such AUTHORIZED RESELLER IS NOT RSA'S AGENT AND IS NOT AUTHORIZED TO
MAKE ANY REPRESENTATIONS, CONDITIONS, COVENANTs OR WARRANTIES, STATUTORY OR
OTHERWISE, ON RSA'S BEHALF NOR TO VARY ANY OF THE TERMS OR CONDITIONS OF THIS
AGREEMENT. IN ADDITION, you ACKNOWLEDGE THAT, UNLESS OTHERWISE AGREED BY such
AUTHORIZED RESELLER IN WRITING OR IF PROHIBITED BY LAW, THE LIMITATIONS OF
CONDITIONS AND WARRANTIES, STATUTORY OR OTHERWISE, AND LIABILITY SET FORTH IN
THIS AGREEMENT ALSO APPLY TO AND BENEFIT SUCH AUTHORIZED RESELLER.

5.   LIMITATION OF LIABILITY. EXCEPT AS PROVIDED IN THIS SECTION 5, RSA'S AND
ITS SUPPLIERS' LIABILITY WILL BE LIMITED IN ANY EVENT TO ACTUAL DIRECT DAMAGES
TO THE EXTENT CAUSED SOLELY BY THE ACTS OR OMISSIONS OF RSA SUBJECT TO A MAXIMUM
LIABILITY OF THE AMOUNT PAID FOR THE SPECIFIC RSA PRODUCT THAT DIRECTLY CAUSED
SUCH DAMAGE. IN NO EVENT SHALL RSA OR ITS SUPPLIERS BE LIABLE FOR INCIDENTAL,
CONSEQUENTIAL, SPECIAL OR INDIRECT DAMAGES, LOST BUSINESS PROFITS, OR LOSS,
DAMAGE OR DESTRUCTION OF DATA, REGARDLESS OF THE FORM OF ACTION, WHETHER IN
CONTRACT, TORT (INCLUDING NEGLIGENCE), BREACH OF WARRANTY OR OTHERWISE, EVEN IF
RSA AND ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF THE SAME. RSA
EXPRESSLY DISCLAIMS ANY AND ALL LIABILITY ASSOCIATED WITH ANY THIRD PARTY OPEN
SOURCE CODE INCLUDED IN THE RSA PRODUCTS. NO LIMITATION AS TO DAMAGES FOR DEATH
OR PERSONAL INJURY IS HEREBY INTENDED. No action, whether in contract or tort,
including negligence, arising out of or in connection with this Agreement may be
brought by either party more than two years after the cause of action has
accrued. Some jurisdictions do not allow the exclusion or limitation of special,
indirect, consequential, exemplary or incidental damages or the limitation of
liability to specified amounts; therefore, You may have other rights in this
matter that vary from jurisdiction to jurisdiction.

6.   TERMINATION. This Agreement shall terminate the earliest of: (1) 30 days
after written notice from one party to the other of the defaulting party's
failure to perform according to its obligations hereunder, which failure is not
cured within 30 days of receipt of notice of such failure to perform; (2)
immediately upon notice to You of a material breach of the License Grant set
forth in Section 2 or (3) immediately upon written notice by either party hereto
if the other party (a) becomes insolvent; (b) files a petition, or has a
petition filed against it, under any laws relating to insolvency, and the
related insolvency proceedings are not dismissed within 60 days after the filing
of such petition; (c) enters into any voluntary arrangement for the benefit of
its creditors; (d) appoints, or has appointed on its behalf, a receiver,
liquidator, examiner or trustee of any of such party's property or assets; or
(e) ceases to carry on business in the ordinary course.

Within 10 days after any termination of this Agreement or the license grant set
forth in Section 2 above, You shall destroy the original and all copies, in
whole or in part, in any form, including, without limitation, partial copies, of
the affected RSA Software and Documentation (and, at RSA's option, certify in
writing to RSA that You have destroyed the same). Notwithstanding the foregoing,
at RSA's option, upon any termination, RSA may request that you return to RSA or
an Authorized Reseller, as the case may be, the original and all copies, in
whole or in part, in any form, including, without limitation, partial copies, of
the affected RSA Software and Documentation.

7.   GENERAL. This Agreement constitutes the entire understanding between RSA
and You with respect to the subject matter hereof. Any change to this Agreement
must be in writing and signed by RSA and You. Terms and conditions as set forth
in any purchase order that differ from, conflict with, or are not included in
this Agreement, shall not become part of this Agreement unless specifically
accepted by RSA in writing. You shall be responsible for and shall pay, and
shall reimburse RSA on request if RSA is required to pay, any sales, use, value
added (VAT), consumption, withholding or other tax (excluding any tax that is
based on RSA's net income), assessment, duty, tariff, or other fee or charge of
any kind or nature that is

<PAGE>

levied or imposed by any governmental authority on the RSA Products. If any
provision of this Agreement shall be held to be void or unenforceable in whole
or in part, such provision, to the extent that it is held to be void or
unenforceable, shall be deemed not to form part of this Agreement, and the
enforceability, legality and validity of the remainder of this Agreement will
not be affected. A waiver by RSA of its rights hereunder shall not be binding
unless set forth in writing signed by RSA waiving its rights. The
non-enforcement or waiver of any provision on one occasion shall not constitute
a waiver of such provision on any other occasions unless expressly stated in
writing signed by RSA. The headings in this Agreement are inserted for
convenience only and do not constitute a part of this Agreement and shall not
modify or limit any of the terms of this Agreement.

8.   ASSIGNMENT. The licenses granted under this Agreement are non-transferable.
Accordingly, You may not assign this Agreement, or any of Your rights or
obligations hereunder, without the written consent of RSA, which consent shall
not be unreasonably withheld.

9.   EXPORT AND IMPORT COMPLIANCE THE RSA SOFTWARE LICENSED UNDER THIS AGREEMENT
IS SUBJECT TO (1) UNITED STATES EXPORT CONTROL LAWS AND REGULATIONS THAT MAY
RESTRICT EXPORTS, RE-EXPORTS AND DISCLOSURES TO FOREIGN PERSONS OF CRYPTOGRAPHIC
ITEMS, AND (2) CERTAIN FOREIGN LAWS THAT MAY RESTRICT THE EXPORT, RE-EXPORT,
IMPORT AND/OR USE OF SUCH ITEMS. PERFORMANCE OF THIS AGREEMENT IS EXPRESSLY MADE
SUBJECT TO ANY EXPORT LAWS, REGULATIONS, ORDERS OR OTHER RESTRICTIONS IMPOSED BY
THE UNITED STATES OF AMERICA OR ANY OTHER APPLICABLE COUNTRY OR GOVERNMENTAL
ENTITY ON THE RSA SOFTWARE, OR INFORMATION RELATING TO IT. NOTWITHSTANDING ANY
OTHER PROVISION OF THIS AGREEMENT TO THE CONTRARY, YOU SHALL NOT DIRECTLY OR
INDIRECTLY IMPORT, EXPORT OR RE-EXPORT ANY RSA SOFTWARE OR INFORMATION
PERTAINING THERETO TO ANY COUNTRY OR FOREIGN PERSON TO WHICH SUCH IMPORT, EXPORT
OR RE-EXPORT IS RESTRICTED OR PROHIBITED WITHOUT FIRST SECURING, IF APPLICABLE,
AN APPROPRIATE EXPORT LICENSE OR OTHER GOVERNMENTAL APPROVAL AT THE TIME OF
IMPORT, EXPORT OR RE-EXPORT. YOU UNCONDITIONALLY ACCEPT FULL RESPONSIBILITY FOR
COMPLIANCE WITH THESE REQUIREMENTS.

10.  FORCE MAJEURE. Neither party shall be held responsible for any delay or
failure in performance of its obligations hereunder to the extent such delay or
failure is caused by fire, flood, strike, civil, governmental or military
authority, act of terrorism or war, act of God, or other similar causes beyond
its reasonable control and without the fault or negligence of the delayed or
non-performing party.

11.  GOVERNING LAW; ARBITRATION. This Agreement shall be governed by, and any
arbitration hereunder shall apply, the laws of the Commonwealth of
Massachusetts, U.S.A., excluding its conflicts of laws principles. The original
of the Agreement has been written in English. The parties hereto waive any
statute, law or regulation that might provide an alternative law or forum or to
have this Agreement written in any language other than English. Any dispute,
controversy or claim arising out of or relating to this Agreement or to a breach
hereof, including its interpretation, performance or termination, shall be
finally resolved by arbitration. The arbitration shall be conducted by a single
arbitrator appointed by American Arbitration Association ("AAA"). The
arbitration shall be conducted in English and in accordance with the commercial
arbitration rules of the AAA, which shall administer the arbitration and act as
appointing authority. The arbitration, including the rendering of the award,
shall take place in Boston, Massachusetts, and shall be the exclusive forum for
resolving such dispute, controversy or claim. The decision of the arbitrator
shall be binding upon the parties hereto, and the expense of the arbitration
shall be borne equally by the parties; provided that each party shall be
responsible for such party's attorney fees and other associated costs. The
decision of the arbitrator shall be executory, and judgment thereon may be
entered by any court of competent jurisdiction. Notwithstanding anything
contained in this Paragraph 11 to the contrary, RSA shall have the right to
institute judicial proceedings against You or anyone acting by, through or under
You, in order to enforce RSA's rights hereunder through reformation of contract,
specific performance, injunction or similar equitable relief.<PAGE>
                                                                   Exhibit 10.23

          Confidential Materials omitted and filed separately with the
         Securities and Exchange Commission. Asterisks denote omissions.

RSA                                     RSA Security Inc.   Tel 781 515 5000
SECURITY                                174 Middlesex Tpke  www.rsasecurity.com
                                        Bedford, MA 01730

                                December 1, 2004

Mr. Tom Takeda
Marketing Manager
Sanyo Semiconductor Corporation
80 Commerce Drive
Allendale, NJ 07401

     RE: Letter Agreement: Manufacture of Microprocessor Die

     Once again, the employees of RSA Security Inc. would like to express their
sincere concern and compassion to the employees and families of Sanyo
Semiconductor Corporation due to the recent earthquake. We have long maintained
a successful relationship with Sanyo and have confidence that this relationship
will continue as Sanyo recovers from this.

     As Sanyo moves its manufacturing facilities for the microprocessor die to
the Gifu plant, it is our understanding that Sanyo desires a clarification of
our projected manufacturing needs of this microprocessor die from February 2005
through May 2005. It is our intention at this point, based on our current
forecast with our contract manufacturer, Flextronics International, that
Flextronics International will be requiring from Sanyo the following quantity of
microprocessor die on our behalf:

          Date Available                       Quantity
          ---------------                     ----------
          February 2, 2005                    [**] units
          February 16, 2005                   [**] units
          March 1, 2005                       [**] units
          April 1, 2005                       [**] units
          May 1, 2005                         [**] units
               PROJECTED ORDER TOTAL          [**] UNITS

     We plan to place our orders with Flextronics who will in turn issue
purchase orders to Sanyo for microprocessor dies (each a "Contract Manufacturing
Order") substantially consistent with the above estimates in our normal supply
chain process. Sanyo agrees to use its best efforts to supply the units in the
quantities specified above to Flextronics substantially in accordance with the
schedule set forth above.

     RSA Security agrees that in the event that Flextronics have not placed
purchase orders with Sanyo for the Projected Order Total substantially in
conformance to the schedule above by

<PAGE>

Mr. Tom Takeda
December 1, 2004
Page 2

May 1, 2005, RSA Security will agree to issue a purchase order to Sanyo for a
number of units equal to the difference between the Projected Order Total minus
the total of the Contract Manufacturing Orders. Sanyo agrees that the unit cost
of the microprocessor die under such purchase order shall be no more than USD
$[**]. RSA Security's standard purchase order terms and conditions shall govern
any such purchase. In the event that RSA Security issues such a purchase order,
Sanyo further agrees to hold any such units in inventory on RSA Security's
behalf in a commercially reasonable manner, consistent with industry standards,
for a commercially reasonable period of time.

     Notwithstanding any contrary provision set forth herein, Sanyo acknowledges
and agrees that it will maintain practices that have been established through
the course of dealing among Sanyo, Flextronics and RSA Security through the
ongoing relationship, including, without limitation, with respect to current
practices related to supplier managed inventory hub and, by May 31, 2005, by
replenishing the three (3) month supply of microprocessor die of approximately
[**] units.

     Neither party shall, for any purpose, be deemed to be an agent of the other
party and the relationship between the parties shall only be that of independent
contractors. Neither party shall have any right or authority to assume or create
any obligations or to make any representations or warranties on behalf of any
other party, whether express or implied, or to bind the other party in any
respect whatsoever.

     This Letter Agreement shall be governed and construed in all respects in
accordance with the domestic laws and regulations of the Commonwealth of
Massachusetts, without regard to its conflicts of laws provisions. This Letter
Agreement is in English only, which language shall be controlling in all
respects. All documents exchanged under this Letter Agreement shall be in
English.

Die availability dates are based on acceptance of the initial base wafer tests
(TR Level Testing by 12/8). Also, the initial die shipment dates are based on
some risk since the Sanyo and RSA reliability tests will not be fully completed
prior to wafer processing.

                            [Signature Page Follows]

<PAGE>
Mr. Tom Takeda
December 1, 2004
Page 3

     Thank you for your continued cooperation in this matter.

                                              Sincerely,

                                              RSA Security Inc.

                                              By: /s/ Jeffrey D. Glidden
                                                  -----------------------------
                                              Jeffrey D. Glidden
                                              CFO & Senior Vice President,
                                                Finance & Operations

Acknowledged and agreed:

Sanyo Semiconductor Corporation

By: /s/ Tom Takeda
    -----------------------------
Name: Tom Takeda
      ---------------------------
Title: Marketing Manager
       --------------------------

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