| US 7,516,489 B2 | ||
| Anti-virus protection at a network gateway | ||
| Pasi Lahti, Helsinki (Finland) | ||
| Assigned to F-Secure Oyj, Helsinki (Finland) | ||
| Appl. No. 10/501,336 PCT Filed Jan. 23, 2003, PCT No. PCT/EP03/00752 § 371(c)(1), (2), (4) Date Jan. 27, 2005, PCT Pub. No. WO03/063431, PCT Pub. Date Jul. 31, 2003. |
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| Claims priority of application No. 0201648.3 (GB), filed on Jan. 25, 2002. | ||
| Prior Publication US 2005/0120229 A1, Jun. 02, 2005 | ||
| Int. Cl. G06F 11/30 (2006.01); G06F 15/16 (2006.01) | ||
| U.S. Cl. 726—24 [709/206; 709/207; 713/188] | 7 Claims |
| 7. A method of preventing the infection of a computer network by a computer virus, where that virus can be spread by e-mail
traffic, the method comprising:
installing at an e-mail gateway of the network an anti-virus application, which application scans at least incoming e-mail
traffic for known viruses using a database of virus signatures;
in the event that a new virus is detected by the provider of the anti-virus application, calculating a checksum for the file
carrying the virus or a relevant part of that file, and sending a notification containing the checksum from the provider to
the anti-virus-application; and
at the anti-virus application, using the checksum to screen e-mails and/or their attachments for the virus until such time
as a signature for the virus is received by the e-mail gateway from the application provider.
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