LIFM algorithm for security association database lookup in...

Details LIFM algorithm for security association database lookup in... LIFM algorithm for security association database lookup in...

2006-08-29

2006-08-29

Vu, Kim (Department: 2135)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Protection at a particular protocol layer

C713S152000, C380S028000, C380S029000, C380S030000

Reexamination Certificate

active

07100043

ABSTRACT:
Current applications used in security system for encryption/decryption/authentication require intense CPU computation for an SAD search. Therefore, a part of the SAD is planted into an ASIC in order to lessen the load of the CPU.The invention provides a high-performance lookup method that is “LIFM” adapted to the ASIC. Initially, the ASIC makes a perfect match by comparing the SAD_index field of all items allocated in the ASIC with an incoming packet to fetch the required SAD_key. If there is no match, the software and hardware are started by issuing an interrupt from the ASIC until the CPU finds a perfectly matched item. Then, the software level updates the perfectly matched item in the ASIC.

REFERENCES:
patent: 6061449 (2000-05-01), Candelore et al.
patent: 6157995 (2000-12-01), Asato
patent: 6480950 (2002-11-01), Lyubashevskiy et al.
patent: 6754662 (2004-06-01), Li
patent: 6772348 (2004-08-01), Ye

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