发明名称 |
Method and apparatus for performing complex pattern matching in a data stream within a computer network |
摘要 |
An apparatus for performing complex pattern matching in a data stream within a computer network is disclosed. The apparatus includes a serial array register and a content-addressable memory (CAM). The CAM includes multiple CAM entries, and each of the CAM entries includes a k-byte pattern concatenated with an n-byte mask. The positions of the k-byte pattern and n-byte mask in each of the CAM entries offset from those in other CAM entries by one byte. Preferably, the k-byte pattern is each of the CAM entries represents a known computer virus pattern. After the capture of a data pattern from a data stream by the serial array register, the CAM register performs a comparison operation between the captured data pattern and all the CAM entries. If there is a match between the captured data pattern and one of the CAM entries, the CAM signals that the data stream contains information that are potentially harmful to the computer network.
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申请公布号 |
US2004190506(A1) |
申请公布日期 |
2004.09.30 |
申请号 |
US20030395722 |
申请日期 |
2003.03.24 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORP. |
发明人 |
DAVIS GORDON TAYLOR;LINGAFELT CHARLES STEVEN;STROLE NORMAN CLARK |
分类号 |
H04L12/28;H04L29/06;(IPC1-7):H04L12/28 |
主分类号 |
H04L12/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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