Shuang Ji

US Patent:

56236000, Apr 22, 1997

Filed:

Sep 26, 1995

Appl. No.:

8/533706

Inventors:

Shuang Ji - Foster City CA
Eva Chen - Cupertino CA

Assignee:

Trend Micro, Incorporated - Cupertino CA

International Classification:

G06F 1134

US Classification:

39518701

Abstract:

A system for detecting and eliminating viruses on a computer network includes a File Transfer Protocol (FTP) proxy server, for controlling the transfer of files and a Simple Mail Transfer Protocol (SMTP) proxy server for controlling the transfer of mail messages through the system. The FTP proxy server and SMTP proxy server run concurrently with the normal operation of the system and operate in a manner such that viruses transmitted to or from the network in files and messages are detected before transfer into or from the system. The FTP proxy server and SMTP proxy server scan all incoming and outgoing files and messages, respectively before transfer for viruses and then transfer the files and messages, only if they do not contain any viruses. A method for processing a file before transmission into or from the network includes the steps of: receiving the data transfer command and file name; transferring the file to a system node; performing virus detection on the file; determining whether the file contains any viruses; transferring the file from the system to a recipient node if the file does not contain a virus; and deleting the file if the file contains a virus.

US Patent:

58899430, Mar 30, 1999

Filed:

Mar 29, 1996

Appl. No.:

8/625800

Inventors:

Shuang Ji - Foster City CA
Eva Chen - Cupertino CA
Yung-Chang Liang - Cupertino CA
Warren Tsai - Taipei, TW

Assignee:

Trend Micro Incorporated

International Classification:

G06F 1300
G07D 700
H04L 900

US Classification:

39518701

Abstract:

The detection and elimination of viruses on a computer network is disclosed. An apparatus for detecting and eliminating viruses which may be introduced by messages sent through a postal node of a network electronic mail system includes polling and retrieval modules in communication with the postal node to determine the presence of unscanned messages and to download data associated with them to a node for treatment by a virus analysis and treatment module. A method for detecting and eliminating viruses introduced by an electronic mail system includes polling the postal node for unscanned messages, downloading the messages into a memory of a node, and performing virus detection and analysis at the node.