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                                                                    EXHIBIT 99.5

                     WRITTEN PLAN FOR TRADING OF SECURITIES

Client Name: Vivian Vitale

Account Number: ______________________________

Date: November 10, 2002

1.       This form constitutes a written plan (the "Plan") for the trading of
securities by the undersigned for the purpose of satisfying the affirmative
defense set forth in Rule 10b5-1(c)(1) under the Securities Exchange Act of 1934
(the "Exchange Act"). The undersigned certifies that he or she is familiar with
Rule 10b5-1 and has obtained such legal or other advice as the undersigned deems
appropriate regarding the Rule.

2.       The undersigned hereby authorizes Lehman Brothers Inc. ("Lehman") to
execute transaction(s) on behalf of the undersigned in accordance with the
following terms:

         Type of transaction(s):   [ ] Purchase   x Sale   [ ]  Derivative

         Name of issuer (the "Issuer") and class of security (the "Security")
         subject to the Plan: RSA Security, Inc. Option to purchase common stock

         Name of principal market or exchange for the Securities (the
         "Exchange"): NASDAQ

         Aggregate amount of Security covered by the Plan (specified in terms of
         number of shares or other securities or a specified dollar value of
         securities (after deducting commissions)) (the "Aggregate Share Number"
         or "Aggregate Amount", as applicable): ________________________________

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------
                                                                Vesting         # Vested to
 Date             Grant #        # Of Shares    Price          Schedule             Date
-------------------------------------------------------------------------------------------
<S>              <C>             <C>            <C>         <C>                 <C>
1/06/99          98-21 NQ          37,500       17.25       Quarterly from         35,156
                                                            date of grant
-------------------------------------------------------------------------------------------
6/18/02          R98-1491 NQ       67,500        4.42       Quarterly from         21,094
                                                            date of grant
-------------------------------------------------------------------------------------------
6/18/02          R98-314 NQ        22,500        4.42       Quarterly from         7, 031
                                                            date of grant
-------------------------------------------------------------------------------------------
6/18/02          R98-291 NQ        67,500        4.42       Quarterly from         21,094
                                                            date of grant
-------------------------------------------------------------------------------------------
7/10/02          94-1031 ISO       93,006        4.04       25% vested on               0
                                                            1st anniversary
                                                            of date of grant
                                                            quarterly
                                                            thereafter
-------------------------------------------------------------------------------------------
7/10/02          94-1031A NQ       6,994         4.04       25% vested on               0
                                                            1st anniversary
                                                            of date of grant
                                                            quarterly
                                                            thereafter
-------------------------------------------------------------------------------------------
</TABLE>

<PAGE>

         Type of order(s) (specified in terms of market orders or limit orders)
         and, if applicable, limit price: See below

         Commission Charge: ____________________________________________________

         Identify date or dates no earlier than two weeks following the date of
         the Plan (each a "Trade Date") (and, if applicable, times) orders
         specified above are to be in force; if multiple orders, specify amount
         of Security (specified in terms of number of shares or other securities
         or a specified dollar value of securities (after deducting
         commissions)) subject to each order (for each order, the "Trade Share
         Number" or "Trade Amount", as applicable); if derivative
         transaction(s), all parameters of the derivative transaction(s) must be
         set out below or in an attached schedule and the undersigned must enter
         into a confirmation setting forth such terms prior to the commencement
         of the Plan:

         Effective January 10, 2003, for the period (1) commencing on the date
         three days after RSA announces its earnings results for the prior
         quarter, and (2) ending on the first day of the last month of each such
         quarter (e.g. March, June, September and December), I want to
         simultaneously exercise and sell 50% of all vested shares with a market
         value of $3.00 or more above the option strike price; i.e. for any
         option priced at $4.42/share, please sell if the market price of share
         of RSA Common Stock is equal to or greater than $7.42/share; 100% of
         all vested shares with a market value of $4.00 or more above the strike
         price ($8.42);

         For 100% of any option priced at $4.04/share, please sell if the market
         price of a share of RSA Common Stock is equal to or greater than
         $9.04/share.

         Additional instructions (e.g., sales should be made in accordance with
         the volume and manner of sale requirements of Rule 144 under the
         Securities Act of 1933 (the "Securities Act")): None

3.       Additional Provisions:

(a)      The undersigned understands that only freely transferable securities or
securities ("Restricted Securities") currently eligible for resale under Rule
144 or Rule 145 under the Securities Act may be subject to the Plan.
Accordingly, if the Plan covers sales, the undersigned represents that the
Securities to be sold under the Plan are (check the applicable box):

    x    owned free and clear by the undersigned and are not subject to any
         liens, claims, charges or other encumbrances or limitations on
         disposition.

   [ ]   in the case of Restricted Securities, (i) owned free and clear by the
         undersigned and are not subject to any liens, claims, charges or other
         encumbrances or limitations on disposition other than the resale
         restrictions under Rule 144 or Rule 145 under the Securities Act and
         (ii) currently eligible for sale under Rule 144 or Rule 145.

<PAGE>

(b)      The undersigned shall provide to Lehman prior to the commencement of
the execution of transactions under the Plan (i) a representation letter from
the Issuer substantially in the form attached as Exhibit A and (ii) if
Restricted Securities are to be sold under the Plan, a representation letter
substantially in the form attached as Exhibit B-1 or Exhibit B-2, as applicable,
in which case the undersigned shall comply with the provisions of such letter.

(c)      The undersigned agrees to deposit in the undersigned's account with
Lehman (i) prior to the initial Trade Date, all Securities to be sold pursuant
to the Plan (or, if an Aggregate Amount is specified, the undersigned's good
faith estimate of the Securities to be so sold) and (ii) prior to the relevant
Trade Date, any cash necessary to make purchases under the Plan. The undersigned
acknowledges and agrees that any failure to make such a deposit may result in
all or part of the Plan not being executed or the Plan being terminated.

(d)      The undersigned directs Lehman to execute the orders specified in the
Plan under ordinary principles of best execution. If, consistent with ordinary
principles of best execution or for any other reason (including a market
disruption), Lehman does not execute an order for the full Trade Amount or Trade
Share Number on any Trade Date, then the undersigned directs Lehman not to
execute the amount of such shortfall.

(e)      If any Trade Date is not an Exchange Business Day, such Trade Date
shall be deemed to be the next succeeding Exchange Business Day, if any, during
the term of the Plan. An "Exchange Business Day" is any day that the Exchange is
open for business and the Securities trade regular way thereon.

(f)      Any fractional number of Securities pursuant to the Plan will be
rounded down to the closest whole number. The Aggregate Share Number, the Trade
Share Number and the limit prices, if applicable, shall be adjusted
automatically on a proportionate basis to take into account any stock split,
reverse stock split or stock dividend with respect to the Securities or any
change in capitalization with respect to the Issuer that occurs during the term
of the Plan.

(g)      The undersigned acknowledges and agrees that Lehman may elect not to
sell Securities pursuant to the Plan at any time when (i) Lehman, in its sole
discretion, has determined that a market disruption, banking moratorium,
outbreak or escalation of hostilities or other crisis or calamity has occurred
or (ii) Lehman, in its sole discretion, has determined that it is prohibited
from doing so by a legal, regulatory, contractual or other restriction
applicable to it or its affiliates or to the undersigned or the undersigned's
affiliates.

(h)      The Plan shall terminate on the earliest to occur of (i) the first
anniversary of the date hereof, (ii) the date on which Lehman receives notice of
the death of the undersigned or the commencement of any proceedings in respect
of or triggered by the undersigned's bankruptcy or insolvency, (iii) the date
that the Issuer or any other person publicly announces a tender or exchange
offer with respect to the Securities, (iv) the date of public announcement of a
merger, acquisition, reorganization, recapitalization or comparable transaction
affecting the securities of the Issuer as a result of which the Securities are
to be exchanged or converted into securities of another company, (v) the date of
public announcement of the voluntary or involuntary liquidation, bankruptcy,
insolvency, or nationalization of, or any analogous proceeding affecting, the
Issuer, and (vi) the fifth Exchange Business Day after the undersigned, or the
first Exchange Business Day after Lehman, notifies the other in writing that the
Plan shall terminate.

(i)      The undersigned certifies that he or she is not in possession of any
material non-public information with respect to the Issuer. "Material"
information for these purposes is any information to which an investor would
reasonably attach importance in reaching a decision to buy, sell or hold
securities of the Issuer. The undersigned agrees not to communicate, directly or
indirectly, any material non-public information relating to the Securities or
the Issuer to any employee of Lehman or its affiliates who is involved, directly
or indirectly, in executing the Plan at any time while the Plan is in effect.
The undersigned acknowledges that Lehman and its affiliates may from time to
time possess material non-public information relating to the Securities or the
Issuer and are under no obligation to disclose that information to the
undersigned.

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(j)      The undersigned certifies that the Plan does not violate or conflict
with any law, regulation, employment plan, policy, contract, judgment, order,
decree or undertaking applicable to the undersigned or to which the undersigned
is a party. The undersigned agrees to notify Lehman in writing if he or she
becomes subject to a legal, regulatory, contractual or other restriction that
would cause transactions pursuant to the Plan to violate or conflict with any
such law, regulation, employment plan, policy, contract, judgment, order, decree
or undertaking. The undersigned further certifies that any consents required to
be obtained with respect to the Plan under any such law, regulation, plan,
policy, contract, judgment, order, decree or undertaking have been obtained and
are in full force and effect and that all conditions of any such consents have
been complied with. The undersigned acknowledges that he or she is solely
responsible for making any necessary disclosures under and otherwise complying
with Rule 144 under the Securities Act, Sections 13 and 16 of the Exchange Act
and other applicable law. The undersigned acknowledges that neither Lehman nor
any of its affiliates has advised the undersigned with respect to any legal,
regulatory, tax, accounting or economic consequences arising from the Plan or
any transactions under the Plan.

(k)      The undersigned certifies that the Plan is being entered into in good
faith and is not part of a plan or scheme to evade the prohibitions of Rule
10b5-1. While the Plan is in effect, the undersigned agrees not to enter into or
alter any corresponding or hedging transaction or position with respect to the
Securities covered by the Plan and agrees not to alter (except as provided in
paragraph (p) below) or deviate from, or attempt to exercise any influence over
how, when or whether transactions are executed pursuant to, the terms of the
Plan. While the Plan is in effect, the undersigned further agrees not to (i)
enter into a binding contract with respect to the purchase or sale of Securities
with another broker, dealer or financial institution (each, a "Financial
Institution"), (ii) instruct another Financial Institution to purchase or sell
Securities or (iii) adopt a Plan for trading with respect to Securities other
than the Plan, the Company's Employee Stock Purchase Plan, or any purchase of
the Company's securities made pursuant to a stock accumulation program for senor
management implemented by the Company. In addition, the undersigned represents
that no such contract, instruction or plan is currently in effect.

(l)      The undersigned shall indemnify Lehman from any losses arising from
Lehman's performance of this Plan. For purposes of this Agreement, the term
"losses" shall mean monetary damages for which a court or regulatory agency of
competent jurisdiction has found Lehman finally liable, after all appeals have
been exhausted, but which shall in no event exceed an amount equal to the
proceeds received by the undersigned in connection with exercises of stock
options pursuant to this Plan. Notwithstanding the foregoing, "losses" shall not
include Lehman's attorneys fees, and Lehman may not settle any action for which
it will claim indemnification without the undersigned's prior written consent.

(m)      Notwithstanding any other provision hereof, Lehman shall not be liable
to the undersigned for (i) special, indirect, punitive, exemplary or
consequential damages, or incidental losses or damages of any kind, even if
advised of the possibility of such losses or damages or if such losses or
damages could have been reasonably foreseen or (ii) any failure to perform or to
cease performance or any delay in performance that results from a cause or
circumstance that is beyond its reasonable control, including but not limited to
failure of electronic or mechanical equipment, strikes, failure of common
carrier or utility systems, severe weather, market disruptions or other causes
commonly known as "acts of God".

(n)      The undersigned acknowledges and agrees that the Plan is a "securities
contract," as such term is defined in Section 741(7) of Title 11 of the United
States Code (the "Bankruptcy Code"), entitled to all of the protections given
such contracts under the Bankruptcy Code.

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(o)      Lehman shall provide notice of any sale under this plan both by
telephone and email to the undersigned and RSA Security of any sale under this
plan to the following within eight hours of completion of such sale:

         -    Vivian Vitale - phone 781-515-5463; email: vvitale@rsasecurity.com

         -    Margaret Seif - phone (781)515-5403; email: mseif@rsasecurity.com

         -    Kathryn Leach - phone (781)515-5422; email: kleach@rsasecurity.com

         -    Susan Peter - phone (781) 515-5504; email: speter@rsasecurity.com

(p)      The Plan shall be governed by and construed in accordance with the laws
of the State of New York and may be modified or amended only by a writing signed
by the undersigned and Lehman. Any modification or amendment by the undersigned
further requires (i) the written consent of Lehman, which consent shall specify
the effective date of the modified or amended Plan; (ii) a representation letter
from the Issuer substantially in the form attached as Exhibit A; (iii) (1) a
certificate signed by the undersigned certifying that the representations and
warranties in this Plan are true and correct at and as of the date of such
certificate as if made at and as of such date or (2) the execution of a new
Plan, as determined by Lehman; and (iv) if Restricted Securities are to be sold
under the Plan, a representation letter substantially in the form attached as
Exhibit B-1 or Exhibit B-2, as applicable, in which case the undersigned shall
comply with the provisions of such letter. The undersigned acknowledges that
terminations of, or modifications or amendments to, a trading plan may affect
the undersigned's ability to rely on Rule 10b5-1. The undersigned may not assign
the undersigned's rights or obligations under the Plan without the written
permission of Lehman and any such assignment without such permission shall be
void. The Plan shall be subject to the terms and conditions of the undersigned's
account agreement with Lehman and, in the event of any inconsistency, the
account agreement shall prevail. Subject to the preceding sentence, the Plan
constitutes the entire agreement between the undersigned and Lehman with respect
to the Plan and supersedes any prior agreements or understandings with regard to
the Plan.

(q)      Lehman will provide written confirmation to the Issuer (I) promptly
following each transaction made under the plan, (ii) promptly upon any
termination of the plan, and (iii) in advance of any proposed modification,
amendment, or suspension of the plan.

/s/ Vivian Vitale                                              11/10/02
---------------------------                                    -----------------
Vivian Vitale                                                  Date

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                    Exhibit A - Issuer Representation Letter

1.       RSA Security (insert name of Issuer) (the "Issuer") represents that it
has approved the Written Plan For Trading of Securities (the "Plan"), dated
November 10, 2002 (insert date), established by Vivian Vitale (insert name of
client) (the "Client") with Lehman Brothers Inc. ("Lehman") relating to the
Common Stock (identify security subject to the Plan) of the Issuer (the
"Securities").

2.       The Issuer represents that (i) the Plan does not violate or conflict
with the Issuer's insider trading or other employee policies and procedures,
(ii) to the best of the Issuer's knowledge, there are no legal, regulatory,
contractual or other restrictions applicable to the Client or the Client's
affiliates that would prohibit or limit the Client from either entering into the
Plan or any transaction pursuant to the Plan and (iii) the Client has not
entered into any other plan for trading with respect to Securities other than
the Plan.

3.       If legended Securities are to be sold in compliance with Rule 144 or
Rule 145 under the Securities Act of 1933 pursuant to the Plan, the Issuer
hereby agrees to delegend such Securities promptly after receiving a copy of the
seller representation letter required by the Plan and Lehman's customary
broker's representation letter.

4.       The Issuer acknowledges that Lehman has no liability or responsibility
to the Issuer for ensuring that the Plan complies or continues to comply with
the Issuer's insider trading or other employee policies and procedures.

Dated: _____________________

Issuer Signature: _____________________________

Signed By: /s/ Margaret K. Seif
           ---------------------------------------------
           Name: Margaret K. Seif
           Title: Sr. Vice President and General Counsel