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%

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%