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%                   
|                                       
|r3 Security Engineering AG              |  | c/o Praeger Dreifuss Muhlebachstrasse 6 CH  8008 Zurich, Switzerland |  | Switzerland                   |  | 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.net Inc.                        |  | 1000 Innovation Drive Ottawa, Ontario, Canada K2K 3E7                 |  | Ontario                       |  | 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%                   



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|                        |  |                                                                                      |  |           |  |     
|----------------------- |  | ------------------------------------------------------------------------------------ |  | --------- |  | ----
|                       
|Entrust s.a.r.l.        |  | 90, Aveue des Champs Elysees Paris, France 75008                                     |  | France    |  | 100%
|                       
|enCommerce Limited      |  | Apex Plaza Forbury Road Reading, Berkshire UK RG1 1AX                                |  | England   |  | 100%
|                       
|enCommerce K.K.         |  | Ascend Jimbocho Building 3F 23 Kanda Jimbocho 2-Chome Chiyoda, Tokyo, Japan 102-0093 |  | Japan     |  | 100%
|                       
|Entrust (China) Limited |  | c/o Baker and McKenzie 1401 Hutchison House 10 Harcourt Road Hong Kong               |  | Hong Kong |  | 100%