<PAGE>

                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                FORM 10-K/A

                              AMENDMENT NO. 1

       FOR ANNUAL AND TRANSITION REPORTS PURSUANT TO SECTIONS 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
    (Mark one)

      [X] Annual report pursuant to Section 13 or 15(d) of the Securities
                              Exchange Act of 1934

                  FOR THE FISCAL YEAR ENDED DECEMBER 31, 2000

                                       OR

    [ ] Transition report pursuant to Section 13 or 15(d) of the Securities
                              Exchange Act of 1934

                        COMMISSION FILE NUMBER 000-24733

                               ----------------

                           ENTRUST TECHNOLOGIES INC.
             (Exact name of registrant as specified in its charter)

                MARYLAND                               62-1670648
    (State or other jurisdiction of         (IRS employer identification no.)
     incorporation or organization)

                       ONE PRESTON PARK SOUTH, SUITE 400
                            4975 PRESTON PARK BLVD.
                                PLANO, TX 75093
              (Address of principal executive offices & zip code)
       Registrant's telephone number, including area code: (972) 943-7300

<TABLE>
   <S>                                        <C>
   Securities registered pursuant to Section
    12(b) of the Act:                         None
   Securities registered pursuant to Section
    12(g) of the Act:                         Common Stock, $.01 par value
</TABLE>

    Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes [X]  No [_]

    Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to
the best of the registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [_]

    The aggregate market value of the common equity held by non-affiliates of
the registrant, computed using the closing sale price of common stock on March
9, 2001, as reported on the Nasdaq National Market, was approximately
$532,000,000 (affiliates included for this computation only: directors,
executive officers and holders of more than 5% of the registrant's common
stock).

    The number of shares outstanding of the registrant's common stock as of
March 9, 2001 was 63,056,738.

                      DOCUMENTS INCORPORATED BY REFERENCE

    Portions of the definitive Proxy Statement to be delivered in connection
with the Annual Meeting of Stockholders to be held April 27, 2001 are
incorporated by reference into Part III of this Form 10-K.
<PAGE>


    This Amendment No. 1 on Form 10-K/A amends and restates the Exhibit Index
and Exhibit 23.1 of the Annual Report on Form 10-K for the fiscal year ended
December 31, 2000 of Entrust Technologies Inc. (the "Report") filed with the
Securities and Exchange Commission on March 20, 2001, for the purpose of
correcting a typographical error which resulted in the inadvertent omission of
the conformed signature of Deloitte and Touche LLP on Exhibit 23.1 of the
Report.

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<PAGE>


                                 SIGNATURE

    Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed
on its behalf by the undersigned, thereunto duly authorized, on the 21st day of
March, 2001.

                                          Entrust Technologies Inc.
                                              (Registrant)

                                                  /s/ David J. Wagner
                                          By: _________________________________

                                                    David J. Wagner

                                                      Vice President,
                                              Finance,Controller and Treasurer


                                       1
<PAGE>

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
 Exhibit
 Number    Description                                              Form Number
 -------   -----------                                              ---- ------
 <C>       <S>                                                      <C>  <C>
  2.1(1)+  Stock Purchase Agreement dated March 14, 2000 by and
           among the Registrant, Cygnacom Solutions, Inc. and the
           Stockholders of Cygnacom Solutions, Inc.                 8-K     2
  2.2(2)+  Agreement and Plan of Merger dated April 18, 2000 by
           and among the Registrant, Enable Acquisition Corp. and
           enCommerce, Inc.                                         8-K     2
  3.1(3)   Amended and Restated Articles of Incorporation of the
           Registrant                                               S-1   3.2
  3.2(3)   Amended and Restated Bylaws of the Registrant            S-1   3.4
  4.1(3)   Specimen certificate for shares of Common Stock, $.01
           par value, of the Registrant                             S-1   4.1
 10.1(3)   Amended and Restated Registration Rights Agreement,
           dated as of July 30, 1998, by and among the Registrant
           and certain stockholders                                 S-1  10.3
 10.2(3)   Strategic Alliance Agreement, dated as of December 31,
           1996, between the Registrant and Northern Telecom
           Limited                                                  S-1  10.5
 10.3(4)*  Employment Letter Agreement dated May 5, 2000 between
           the Registrant and Paul A. Doscher                       10-Q 10.6
 10.4*     Separation Agreement and Release dated February 24,      Previously
           2001 between the Registrant and John A. Ryan             filed
 10.5(3)*  Letter Agreement, dated as of June 4, 1997, between
           the Registrant and Richard D. Spurr                      S-1  10.12
 10.6(7)*  Letter Agreement, dated as of November 14, 1997,
           between the Registrant and Hansen Downer                 10-Q 10.2
 10.7(4)*  Amended and Restated 1996 Stock Incentive Plan, as
           amended                                                  10-Q 10.10
 10.8(3)   Lease Agreement, dated as of January 28, 1998, between
           Colonnade Development Incorporated and Entrust
           Technologies Limited                                     S-1  10.16
 10.9(5)   Standard Office Building Lease Agreement, dated as of
           January 19, 1999, between HMS Office L.P. and the
           Registrant                                               10-K 10.16
 10.10(6)* Letter Agreement dated October 11, 1999 between the
           Registrant and David L. Thompson                         S-3  10.3
 10.11(6)  Development Agreement dated December 29, 1999 between
           Canderel Management Inc. and Entrust Technologies
           Limited                                                  S-3  10.4
 10.12(6)  Lease dated December 29, 1999 in Pursuance of the
           Short Forms of Lease Act between 786473 Ontario
           Limited, Entrust Technologies Limited and the
           Registrant                                               S-3  10.5
 10.13(6)  Lease dated December 29, 1999 by and between 3559807
           Canada Inc., Entrust Technologies Limited and the
           Registrant                                               S-3  10.6
 10.14(4)* enCommerce, Inc. 1997 Stock Option Plan                  10-Q 10.1
 10.15(4)  enCommerce, Inc. 1997B Stock Option Plan                 10-Q 10.2
 10.16(4)* Employment Letter Agreement dated May 5, 2000 between
           the Registrant and J. Alberto Yepez                      10-Q 10.4
 10.17     Common Stock Warrant No. 1 of the Registrant dated       Previously
           June 26, 2000 issued to Andersen Consulting LLP          filed
 10.18(4)* Non-competition and Non-solicitation Agreement
           effective as of June 26, 2000 between the Registrant
           and Alberto Yepez                                        10-Q 10.5
 10.19(4)* Non-competition and Non-solicitation Agreement
           effective as of June 26, 2000 between the Registrant
           and Paul Doscher                                         10-Q 10.7
 10.20(4)  Lease Agreement (Single Tenant Industrial) between
           Melchor Investment Company and Applied Materials, Inc.
           dated January 27, 1996                                   10-Q 10.8
 10.21(4)  Sublease Agreement dated as of May 14, 1999 by and
           between Applied Materials, Inc. and enCommerce, Inc.,
           including First Amendment to Sublease Agreement dated
           September 1, 1999                                        10-Q 10.9
</TABLE>
--------
 *  Management contract or compensatory plan or arrangement filed in response
    to Item 14(a)(3) of the instructions to Form 10-K.
<PAGE>

<TABLE>
<CAPTION>
 Exhibit
 Number  Description                        Form Number
 ------- -----------                        ---- ------
 <C>     <S>                                <C>  <C>
 21      Subsidiaries of the Registrant     Previously
                                            filed
 23.1    Consent of Deloitte & Touche LLP   Enclosed
                                            herewith
</TABLE>

(1) Incorporated herein by reference to the Registrant's Current Report on Form
    8-K dated March 14, 2000 filed with the Securities and Exchange Commission
    on March 24, 2000 (File No. 000-24733).
(2) Incorporated herein by reference to the Registrant's Current Report on Form
    8-K dated April 18, 2000 filed with the Securities and Exchange Commission
    on May 1, 2000 (File No. 000-24733).
(3) Incorporated herein by reference to the Registrant's Registration Statement
    on Form S-1 (File No. 333-57275).
(4) Incorporated herein by reference to the Registrant's Quarterly Report on
    Form 10-Q for the quarterly period ended June 30, 2000 (File No. 000-
    24733).
(5) Incorporated herein by reference to the Registrant's Annual Report on Form
    10-K for the fiscal year ended December 31, 1998 (File No. 000-24733).
(6) Incorporated herein by reference to the Registrant's Registration Statement
    on Form S-3 (File No. 333-95375).
(7) Incorporated herein by reference to the Registrant's Quarterly Report on
    Form 10-Q for the quarterly period ended March 31, 2000 (File No. 000-
    24733).
 +  The Registrant agrees to furnish supplementally a copy of any omitted
    schedules to this agreement to the Securities and Exchange Commission upon
    its request.

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