EXHIBIT 21

SUBSIDIARIES OF THE REGISTRANT



|                                        |  |                                                                                        |  |                              |  |                       
|--------------------------------------- |  | -------------------------------------------------------------------------------------- |  | ---------------------------- |  | ----------------------
|Subsidiary Legal Name                   |  | Address of Subsidiary                                                                  |  | Jurisdiction ofIncorporation |  | Percentage ofOwnership
|                                        |  |                                                                                        | 
|Entrust Limited                         |  | 1000 Innovation Drive Ontario Ottawa,
Canada K2K 3E7                                   |  | Ontario                      |  | 100%                  
|                                        |  |                                                                                        | 
|Entrust (Europe) Limited                |  | Apex Plaza B2 Forbury Road Reading, Berkshire, UK FG1 1AX                              |  | England                      |  | 100%                  
|                                        |  |                                                                                        | 
|Entrust GmbH                            |  | Munich Airport Center Terminalstrasse Mitte
18 Munich, Germany 85356                   |  | Germany                      |  | 100%                  
|                                        |  |                                                                                        | 
|Entrust Technologies (Switzerland) GmbH |  | c/o Praeger Dreifuss Muhlebachstrasse 6 CH8008 Zurich, Switzerland                    |  | Switzerland                  |  | 100%                  
|                                        |  |                                                                                        | 
|Entrust International L.L.C.            |  | One Lincoln Center 5400 LBJ Freeway Suite 1340 Dallas, TX 75240                        |  | Delaware                     |  | 100%                  
|                                        |  |                                                                                        | 
|CygnaCom Solutions, Inc.                |  | 7925 Jones Branch Drive Suite 5200 McLean, VA 22102-3321                               |  | Virginia                     |  | 100%                  
|                                        |  |                                                                                        | 
|Orion Security Solutions, Inc.          |  | 2410 N. Greenbrier Court Arlington, VA
22207                                           |  | Virginia                     |  | 100%                  
|                                        |  |                                                                                        | 
|enCommerce, Inc.                        |  | 455 El Camino Real Santa Clara, California
95050                                       |  | California                   |  | 100%                  
|                                        |  |                                                                                        | 
|Business Signatures Corporation         |  | 333 Twin Dolphin Drive Suite 112 Redwood City, California 94065                        |  | California                   |  | 100%                  
|                                        |  |                                                                                        | 
|enCommerce Limited                      |  | Apex Plaza Forbury Road Reading, Berkshire UK RG1 1AX                                  |  | England                      |  | 100%                  
|                                        |  |                                                                                        | 
|Entrust Japan Co. Ltd.                  |  | Ascend Jimbocho Building 3F 23 Kanda Jimbocho 2-Chome Chiyoda-ku, Tokyo Japan 101-0051 |  | Japan                        |  | 99%