Subscription of F-Secure shares with F-Secure 1998 warrants

Helsinki, Finland - August 20, 2002

A total of 57,300 F-Secure shares were subscribed for with the A warrants, 31,195 F-Secure shares with the B warrants and 5,232 F-Secure shares were subscribed for with the C warrants attached to the F-Secure 1998 Warrant Plan. The issue of the 1998 Warrant Plan was approved by the Annual General Meeting of April 30, 1998.

In aggregate the number of shares was increased by 93,727. The corresponding increase in the share capital, in total EUR 937,27 was registered in the Finnish Trade Register on August 20, 2002. As a result of the increase, the share capital of F-Secure currently is EUR 1,435,136.42 and the total number of shares is 143,513,642. F-Secure received as additional shareholders' equity a total of EUR 10,658,39.

The holders of the new shares are entitled to all shareholders' rights from the registration date. The Company has submitted an application for the new shares to be listed on the Helsinki Exchanges together with the other Company shares. The trading with the new shares will commence on August 21, 2002.

The subscription period for the A warrants, B warrants and C warrants of the F-Secure 1998 Warrant Plan began on 1 April 2000, on 1 April 2001, and 1 April 2002, respectively.

F-Secure Corporation

Risto Siilasmaa
President & CEO

Additional information:
F-Secure Corporation
Risto Siilasmaa, President and CEO     	tel.358 9 2520 5510
Markku Pirskanen, CFO 			tel.358 9 2520 5606