Pipelined engine for encryption/authentication in IPSEC
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United States of America Patent
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N/A
Issued Date -
Sep 11, 2003
app pub date -
Jul 19, 2002
filing date -
Mar 5, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention provides a device by using a pipelined architecture for enhancing the efficiency and speed of encryption/authentication. To handle all modes defined in RFC2401, 3 DES-HMAC sub-engines are built in the IPSEC engine. Each DES-HMAC sub-engine includes one DES engine and one HMAC engine. By utilizing the pipelined architecture for the combinations of multiple modes, it does not take any waiting time in the encryption and authentication processing. A data block is immediately sent to the next DES_HMAC sub-engine for the next encryption and authentication process right after the previous DES_HMAC sub-engine has outputted the data block.
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