Security association management through the use of lookup...

Details Security association management through the use of lookup... Security association management through the use of lookup...

2001-09-26

2008-08-05

Moise, Emmanuel L (Department: 2137)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular node for directing data and applying cryptography

C713S189000

Reexamination Certificate

active

07409542

ABSTRACT:
Methods and apparatuses for managing tables of security associations (SA) are described. A device driver operating in an environment, for example, NDIS, where a unique handle is selected for each transmit SA and the SPI for each receive SA is selected with a random algorithm, divides transmit SAs from receive SAs in separate tables. An SA lookup table having a whole binary number of entries that is the lowest binary number greater than five times the number of SAs supported by the device driver contains information to match an SA to a data packet, and locate the SA in memory. The lookup table is searched using a bit-wise AND hash function.

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Apparna, R. et al., “Monitoring Ethernet Network activity with NDIS drivers,” Nov. 22, 1999, pp. 1-2. <http://www.cswl.com/whiteppr/white/ethernet.html>.

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