Document:

<PAGE>

                                                                   EXHIBIT 10.28

                             AMENDMENT NO. 1 TO THE
                          LIMITED PARTNERSHIP AGREEMENT
                                       OF
                              RSA PARTNERS I, L.P.

     AMENDMENT dated the 1st day of December, 2001, between RSA Ventures, Inc.,
as general partner, and RSA Security Inc., Charles R. Stuckey, Jr. and James K.
Sims, as limited partners of RSA Partners I, L.P. (the "Partnership").

     WHEREAS, the parties hereto desire to amend the Limited Partnership
Agreement of the Partnership, dated as of April 10, 2001 (the "Agreement"), as
hereinafter provided.

     NOW, THEREFORE, the parties hereto, in consideration of the premises and
the agreements herein contained and intending to be legally bound hereby, agree
as follows:

     1.   The Percentage Interest (as such term is defined in the Agreement) of
          RSA Security Inc. is hereby changed to 71.514226%.

     2.   The Percentage Interest of Charles R. Stuckey, Jr. is hereby changed
          to 0.0008743%.

     3.   The Percentage Interest of James K. Sims is hereby changed to
          0.0005247%.

     4.   Schedule A to the Agreement is hereby revised to reflect the foregoing
          changes.

     This Amendment may be executed in any number of counterparts, each of which
shall be an original but all of which taken together shall constitute one
instrument.

     IN WITNESS WHEREOF, the undersigned have executed this Amendment on the day
and year first above written.

GENERAL PARTNER                      LIMITED PARTNERS

RSA Ventures, Inc.                   RSA Security Inc.

By: /s/ John F. Kennedy              By: /s/ John F. Kennedy
    ------------------------             ---------------------------------------
Title: Treasurer                     Title: CFO, SVP, Finance and Operations
       ---------------------                ------------------------------------

<PAGE>
                                         /s/ Charles R. Stuckey, Jr.
                                         ---------------------------------------
                                         Charles R. Stuckey, Jr.

                                         /s/ James K. Sims
                                         ---------------------------------------
                                         James K. Sims<PAGE>
                                                                   EXHIBIT 10.30

                             AMENDMENT NO. 1 TO THE
                          LIMITED PARTNERSHIP AGREEMENT
                                       OF
                              RSA VENTURES I, L.P.

       AMENDMENT dated the 27th day of November, 2001 by and among Barry
Rosenbaum (the "Transferor"), RSA Investments Inc. (the "Transferee") and RSA
Partners I, L.P., as general partner of RSA Ventures I, L.P. (the
"Partnership").

       WHEREAS, the Transferor has transferred on the date first written above,
its entire interest as a limited partner in the Partnership to the Transferee.

       WHEREAS, the parties hereto desire to amend the Limited Partnership
Agreement of the Partnership, dated as of April 10, 2001 (as hereafter amended,
the "Partnership Agreement"), to reflect such transfer.

       NOW, THEREFORE, the parties hereto, in consideration of the premises and
the agreements herein contained and intending to be legally bound hereby, agree
as follows:

       The section of Schedule A to the Partnership Agreement entitled "LIMITED
       PARTNERS" shall be amended by deleting in its entirety the reference to
       the Transferor and by changing the Subscription of the Transferee from
       $100,000,000 to $100,050,000.

       This Amendment may be executed in any number of counterparts, each of
which shall be an original but all of which taken together shall constitute one
instrument.

       IN WITNESS WHEREOF, the undersigned have executed this Amendment on the
day and year first above written.

<PAGE>
                                     TRANSFEROR

                                     /S/ Barry Rosenbaum
                                     -------------------------------------------
                                     Barry Rosenbaum

                                     TRANSFEREE

                                     RSA Investments Inc.

                                     By: /s/ Charles R. Stuckey, Jr.
                                         ---------------------------------------
                                         Title: President

                                     GENERAL PARTNER

                                     RSA Partners I, L.P.
                                     By: RSA Ventures, Inc., its general partner

                                     By: /s/ John F. Kennedy
                                         ---------------------------------------
                                         Title: Treasurer<PAGE>
                                                                   EXHIBIT 10.31

                             AMENDMENT NO. 2 TO THE
                          LIMITED PARTNERSHIP AGREEMENT
                                       OF
                              RSA VENTURES I, L.P.

       AMENDMENT dated the 28th day of November, 2001, between RSA Partners I,
L.P., as general partner, and RSA Investments Inc., as limited partner of RSA
Ventures I, L.P. (the "Partnership").

       WHEREAS, the parties hereto desire to amend the Limited Partnership
Agreement of the Partnership, dated as of April 10, 2001 (as heretofore and
hereafter amended, the "Agreement"), as hereinafter provided.

       NOW, THEREFORE, the parties hereto, in consideration of the premises and
the agreements herein contained and intending to be legally bound hereby, agree
as follows:

       1.     All references in the Agreement to "Advisory Company" are hereby
              deleted therefrom.

       2.     Paragraph 3(m) of the Agreement is hereby deleted in its entirety.

       3.     The date "December 31, 2006" appearing in Paragraph 3(n) of the
              Agreement is hereby changed to correspond to the date of this
              Amendment.

       4.     The Subscription of the General Partner is hereby reduced from
              $502,750 to $251,375 and the Subscription of RSA Investments Inc.
              (as the sole limited partner of the Partnership) is hereby reduced
              from $100,050,000 to $50,025,000, and Schedule A to the Agreement
              is hereby amended accordingly.

       5.     The date "December 31, 2011" appearing in Paragraph 11(a) of the
              Agreement is hereby changed to "December 31, 2008".

       6.     The phrase ", or request that the General Partner furnish,"
              appearing in the fourth sentence of Paragraph 17(b) of the
              Agreement is hereby deleted in its entirety.

<PAGE>

       7.     The phrase "and shall be audited by a nationally recognized firm
              of independent public accountants" appearing in the second
              sentence of Paragraph 17(c) of the Agreement is hereby deleted in
              its entirety.

       8.     The phrase "each of the first three quarters" appearing in
              Paragraph 17(d) of the Agreement is hereby changed to "the second
              quarter".

       9.     Paragraph 17(i) of the Agreement is hereby deleted in its
              entirety.

       10.    From and after the date of this Amendment No. 2, no additional
              Subscriptions shall be accepted from the Partners and no
              additional Limited Partners shall be admitted to the Partnership.

       This Amendment may be executed in any number of counterparts, each of
which shall be an original but all of which taken together shall constitute one
instrument.

       IN WITNESS WHEREOF, the undersigned have executed this Amendment on the
day and year first above written.

GENERAL PARTNER                                   LIMITED PARTNER
---------------                                   ---------------
RSA Partners I, L.P.                              RSA Investments Inc.
By: RSA Ventures, Inc., its general partner

    By: /s/ John F. Kennedy                       By: Charles R. Stuckey, Jr.
        -----------------------------------       ------------------------------
        Title: Treasurer                          Title: President<PAGE>

                                                                   EXHIBIT 10.32

                              AMENDED AND RESTATED
                        EMPLOYMENT AGREEMENT AND RELEASE

     This Amended and Restated Employment Agreement and Release (the
"Agreement") is made as of the 31st day of December, 2001 between RSA Security
Inc., a Delaware corporation (the "COMPANY"), and Thomas Schuster, an employee
of the Company (the "EMPLOYEE").

                                    RECITALS

     The Company currently employs the Employee under the terms of an Employment
Agreement dated as of April 1, 2000 (the "ORIGINAL AGREEMENT"). The Company
desires to continue to employ the Employee, and the Employee desires to continue
to be employed by the Company until the conclusion of the Employment Period (as
defined below). The parties desire to amend and restate the Original Agreement.

                                   WITNESSETH

     NOW, THEREFORE, in consideration of the mutual covenants and promises
contained herein and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties hereto, each intending
to be legally bound hereby, agree that the Original Agreement is hereby amended
and restated as follows:

1.   EMPLOYMENT. The Company hereby agrees to continue to employ the Employee,
and the Employee hereby accepts continued employment with the Company, upon the
terms set forth in this Agreement, for the period commencing on the date hereof
and ending January 31, 2003 (the "EMPLOYMENT PERIOD"), unless sooner terminated
in accordance with the provisions of Section 4.

2.   TITLE; CAPACITY. During the Employment Period, the Employee shall serve as
Senior Vice President, Emerging Market Development, and shall have a principal
place of business at the Company headquarters located at Bedford, Massachusetts.
The Employee shall be subject to the supervision of, and shall have such
authority as is delegated to the Employee by, the CEO of the Company. Effective
January 1, 2002, the Employee shall no longer be a "Section 16" officer of the
Company. The Employee hereby accepts such employment and agrees to undertake the
duties and responsibilities inherent in such position and such other duties and
responsibilities as the CEO or the Board shall from time to time reasonably
assign to him. The Employee agrees to devote: (i) the Employee's entire business
time, attention and energies to the business and interests of the Company in
January 2002, and (ii) thereafter, for the duration of the Employment

<PAGE>

Period, not more than one day per week to the business and interests of the
Company. The Employee agrees to abide by the rules, regulations, instructions,
personnel practices and policies of the Company and any changes therein which
may be adopted from time to time by the Company. The Employee acknowledges
receipt of copies of all such rules and policies committed to writing as of the
date of this Agreement.

3.   COMPENSATION AND BENEFITS.

     (a)  SALARY. During the Employment Period, the Company shall pay the
Employee, in semi-monthly installments, an annual salary of $216,000. The
Employee's salary shall be increased by any salary restoration provided by the
Company to other senior officers of the Company during the Employment Period.

     (b)  BENEFITS. During the Employment Period, the Employee shall be entitled
to participate in all benefit programs that the Company establishes and makes
available to its employees, if any, to the extent that Employee's position,
tenure, salary, age, health and other qualifications make him eligible to
participate, including, but not limited to, health, dental, disability and life
insurance. However, the Employee shall not be entitled to receive any additional
options to purchase the Company's stock during the Employment Period, except
that the Company shall grant to the Employee those replacement options to which
he may be entitled pursuant to the terms of the Offer to Exchange Outstanding
Options Held by Employees of RSA Security Inc. dated November 15, 2001.

     (c)  BONUS. The Employee shall not be entitled to receive any incentive
payment or other bonus during the Employment Period.

     (d)  OTHER BENEFITS. During the Employment Period, the Employee shall be
entitled to a monthly car allowance of $525 and up to $3,000 for the expenses of
personal financial planning during the Employment Period. In addition, the
Company shall continue to contribute to the Employee's current pension at an
amount equal to $4,200 per month. The pension amount shall be paid in monthly
installments to Employee's designated accounts.

     (e)  NO OTHER AMOUNTS DUE. The Employee acknowledges that he is not
entitled to any other amounts, including but not limited to severance payments
from the Company, which might otherwise be payable upon conclusion of the
Employment Period, other than legitimate expenses incurred by the Employee in
connection with Employee's performance of his duties.

4.   EMPLOYMENT TERMINATION DURING THE EMPLOYMENT PERIOD.

     (a)  During the Employment Period, the employment of the Employee by the
Company pursuant to this Agreement shall terminate only upon the occurrence of
any of the following:

                                       2

<PAGE>

          (i) at the election of the Company for "Cause" (as defined below), in
     accordance with the terms of Paragraph 4(c) below;

          (ii) upon the death or disability of the Employee;

          (iii) at the election of the Employee, upon thirty (30) days' prior
     written notice of termination; or

          (iv) at the election of the Company, upon thirty (30) days' prior
     written notice of termination.

     (b)  DEFINITION OF "CAUSE." For purposes of this Agreement, "CAUSE" for
termination shall be deemed to exist upon:

          (i) a good faith finding by the Company of the failure of the Employee
     to perform his assigned duties for the Company, in accordance with the
     process set forth in Paragraph 4(c) below; or

          (ii) the conviction of the Employee of, or the entry of a pleading of
     guilty or nolo contendere by the Employee to, any felony involving
     dishonesty or moral turpitude; or

          (iii) any material breach by the Employee of the terms of this
     Agreement or of any written agreement between the Employee and the Company
     relating to proprietary information, confidentiality, non-competition or
     non-solicitation.

     (c)  DEFINITION OF "DISABILITY." For purposes of this Agreement,
"DISABILITY" shall mean the inability to engage in any substantial gainful
activity by reason of any medically determinable physical or mental impairment
which can be expected to result in death or which has lasted or can be expected
to last for a continuous period of not less than 12 months.

5.   TERMINATION DURING THE EMPLOYMENT PERIOD.

     (a)  TERMINATION FOR CAUSE. If the Employee's employment with the Company
is terminated during the Employment Period for Cause, as set forth in Paragraph
4 above, the Company shall pay to the Employee the compensation and benefits
that would otherwise be payable to the Employee through the last day of his
actual employment by the Company.

     (b)  VOLUNTARY TERMINATION; DEATH OR DISABILITY; TERMINATION WITHOUT CAUSE.
If the Employee's employment with the Company is terminated during the
Employment Period: (i) voluntarily by the Employee, (ii) by reason of the
Employee's death or disability, or (iii) without Cause, the Company shall have
the following obligations:

                                       3
<PAGE>

          (A) AMOUNTS DUE THROUGH LAST DAY OF EMPLOYMENT. If not previously
     paid, the Company shall pay to the Employee the compensation and benefits
     that would otherwise be payable to the Employee through the last day of his
     actual employment by the Company.

          (B) COMPENSATION FOR REMAINDER OF EMPLOYMENT PERIOD. The Company shall
     pay to the Employee, an amount equal to the pro rata portion of the
     Employee's annual base salary for the remainder of the Employment Period,
     such amount to be paid in equal installments in accordance with the
     Company's normal payroll practices over the remainder of the Employment
     Period.

          (C) BENEFITS FOR REMAINDER OF EMPLOYMENT PERIOD. (1) In the event that
     the Employee's employment is terminated prior to the end of the Employment
     Period voluntarily by the Employee, the Company shall have no obligation to
     provide any benefits after the last day of Employee's actual employment by
     the Company.

               (2) In the event that the Employee's employment is terminated
     prior to the end of the Employment Period, (1) without Cause, or (2) by
     reason of the Employee's death or disability, the Company shall provide the
     Employee with medical and dental insurance benefits identical or
     substantially similar to those which the Employee was receiving immediately
     prior to the last day of the Employee's actual employment by the Company
     for the remainder of the Employment Period.

               (3) On the date following termination of the Company's obligation
     to provide the Employee with benefits as described in the preceding
     paragraphs, the Employee shall be eligible to commence benefit coverage in
     accordance with the Consolidated Omnibus Budget Reconciliation Act of 1995,
     as amended.

6.  RELEASE.

     (a)  In exchange for the Company entering into this Agreement and granting
the Employee the consideration described herein, and other good and valuable
consideration, the receipt of which is hereby acknowledged, the Employee and his
representatives, agents, estate, heirs, successors and assigns, absolutely and
unconditionally hereby release, discharge, indemnify and hold harmless the
Releasees (defined to include the Company and/or any of its parents,
subsidiaries or affiliates, predecessors, successors or assigns, and its and
their respective current and/or former partners, directors,
shareholders/stockholders, officers, employees, attorneys and/or agents, all
both individually and in their official capacities), from any and all actions or
causes of action, suits, claims, complaints, contracts, liabilities, agreements,
promises, contracts, torts, debts, damages, controversies, judgments, rights and
demands, whether existing or contingent, known or unknown, which arise out of
his employment with, change in employment status with, and/or separation of
employment from, the Company.

                                       4

<PAGE>

     (b)  This release is intended by the Employee to be all encompassing and to
act as a full and total release of any claims, whether specifically enumerated
herein or not, that the Employee may have or have had against the Releasee,
including, but not limited to, any claims arising from any federal or state law
or regulation dealing with either employment, employment benefits or employment
discrimination such as those laws or regulations concerning discrimination on
the basis of race, color, creed, religion, age, sex, sexual harassment, sexual
orientation, national origin, ancestry, handicap or disability, veteran status
or any military service or application for military service; any contract,
whether oral or written, express or implied; any tort; any claim for equity or
other benefits; or any other statutory and/or common law claim.

     (c)  Notwithstanding anything to the contrary set forth above in this
Section 6, the above release will not preclude the Employee from taking action
to enforce his rights under this Agreement.

7.   ACCORD AND SATISFACTION.

The amounts set forth above in Section 3, if paid as scheduled herein, shall be
complete and unconditional payment, settlement, accord and/or satisfaction with
respect to all obligations and liabilities of the Releasee to the Employee,
including, without limitation, all claims for back wages, salary, vacation pay,
draws, incentive pay, bonuses, stock and stock options, commissions, severance
pay, any and all other forms of compensation or benefits, attorney's fees, or
other costs or sums.

8.   WAIVER OF RIGHTS AND CLAIMS UNDER THE AGE DISCRIMINATION AND EMPLOYMENT ACT
     OF 1967:

Since the Employee is 40 years of age or older, the Company has informed the
Employee that he has or may have specific rights and/or claims under the Age
Discrimination in Employment Act of 1967 (ADEA), as amended, and the Older
Workers Benefit Protection Act ("OWBPA") and the Employee agrees that:

     (a)  In consideration for the amounts and benefits described in Section 3
of this Agreement, which the Employee is not otherwise entitled to receive, the
Employee specifically and voluntarily waives such rights and/or claims under the
ADEA which Employee might have against the Releasees to the extent such rights
and/or claims arose prior to the date this Agreement was executed;

     (b)  the Employee understands that rights or claims under the ADEA which
may arise after the date this Agreement is executed are not waived by the
Employee;

     (c)  the Employee is advised to consider the terms of this Agreement
carefully and consult with or seek advice from an attorney of Employees' choice
or any other person of Employee's choosing prior to executing this Agreement;

                                       5

<PAGE>

     (d)  the Employee acknowledges that the Employee was informed, and is
herein informed, and understands that the Employee has twenty-one (21) days
within which to consider this Agreement;

     (e)  the Employee has carefully read and fully understand all of the
provisions of this Agreement, and the Employee knowingly and voluntarily agrees
to all of the terms set forth in this Agreement;

     (f)  in entering into this Agreement the Employee is not relying on any
representation, promise or inducement made by the Company or its attorneys with
the exception of those promises described in this document;

     (g)  the Employee may waive the twenty-one (21) day review period by
signing where indicated on the last page of this Agreement; and (h) the 21-day
review period will not be affected or extended by any revisions which might be
made to this Agreement.

9.   GENERAL.

     (a)  PRIOR AGREEMENTS. This Agreement supersedes and replaces any prior
written or oral agreements between the Company and the Employee relating to the
subject matter covered hereby, including, without limitation, the Original
Agreement.

     (b)  GOVERNING LAW. The terms of this Agreement shall be governed by the
internal laws (and not the law of conflicts) of the Commonwealth of
Massachusetts. Any action brought to enforce this Agreement shall be brought in
the courts of the Commonwealth of Massachusetts.

     (c)  BINDING EFFECT. This Agreement shall be binding upon and inure to the
benefit of the Company, its successors and assigns, including any corporation
with which or into which the Company may be merged or which may succeed to the
assets or business of the Company.

     (d)  ENTIRE AGREEMENT; MODIFICATION. This Agreement constitutes the entire
agreement of the parties hereto with respect to the subject matter hereof and
may not be modified or amended in any way except in writing by the parties
hereto.

     (e)  SAVINGS CLAUSE. In case any provision of this Agreement shall be
invalid, illegal or otherwise unenforceable, the validity, legality and
enforceability of the remaining provisions shall in no way be affected or
impaired thereby.

     (f)  COUNTERPARTS. This Agreement may be signed in counterparts, which when
viewed together, will be deemed to be one instrument.

                                       6

<PAGE>

     IN WITNESS WHEREOF, the parties hereto, intending to be legally bound, have
hereunto executed this Agreement the day and year first written above.

                                   RSA Security Inc.

                                   By:   /s/ Vivian M. Vitale
                                         ---------------------------------------
                                         Vivian M. Vitale
                                         Senior Vice President, Human Resources

I REPRESENT THAT I HAVE READ THE FOREGOING AGREEMENT, THAT I FULLY UNDERSTAND
THE TERMS AND CONDITIONS OF SUCH AGREEMENT AND THAT I AM KNOWINGLY AND
VOLUNTARILY EXECUTING THE SAME. IN ENTERING INTO THIS AGREEMENT, I DO NOT RELY
ON ANY REPRESENTATION, PROMISE OR INDUCEMENT MADE BY THE COMPANY OR ITS
ATTORNEYS WITH THE EXCEPTION OF THE CONSIDERATION DESCRIBED IN THIS DOCUMENT.

ACCEPTED:

/s/ Thomas L. Schuster
--------------------------------------------
Thomas L. Schuster

Date: 2/14/02

                                       7

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00037-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00037-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00037-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00037-of-00352.parquet"}]]