EXHIBIT 21

SUBSIDIARIES OF THE REGISTRANT



|                                        |  |                                                                                        |  |                               |  |                        
|--------------------------------------- |  | -------------------------------------------------------------------------------------- |  | ----------------------------- |  | -----------------------
|Subsidiary Legal Name                   |  | Address of Subsidiary                                                                  |  | Jurisdiction of Incorporation |  | Percentage of Ownership
|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 Hanover Park 16633 Dallas Parkway Suite 800 Addison, TX 75001                      |  | Delaware                      |  | 100%                   
|                                        |  |                                                                                        | 
|CygnaCom Solutions, Inc.                |  | 7927 Jones Branch Drive Suite 100 West McLean, VA 22101-3305                           |  | Virginia                      |  | 100%                   
|                                        |  |                                                                                        | 
|enCommerce, Inc.                        |  | 455 El Camino Real Santa Clara, California
95050                                       |  | California                    |  | 100%                   
|                                        |  |                                                                                        | 
|Entrust s.a.r.l.                        |  | 90, Avenue des Champs Elysees Paris, France
75008                                      |  | France                        |  | 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%