Information security – Access control or authentication – Network
Reexamination Certificate
2006-06-02
2010-12-28
Patel, Nirav (Department: 2435)
Information security
Access control or authentication
Network
C713S154000
Reexamination Certificate
active
07861291
ABSTRACT:
A method, data processing system, and computer program product are provided for retrieving access rules using a plurality of subtables. An incoming packet that includes fields of data is received from a network. A key is formed from the fields, the key includes a number of subkeys. The subkeys are selected and each of the selected subkeys is used to search a different subtable. If a subtable entry is a pointer, a next level subtable is searched until a failure or data is encountered. If a failure occurs, a default rule is applied. If data is encountered, the key is masked using a stored mask value. The resulting masked key is compared to a stored rule. If they match, the identified rule is applied, otherwise the default rule is applied.
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Gunther Bernard Karl
Kramer David B.
Thron Chris P.
Chiu Joanna G.
Freescale Semiconductor Inc.
Patel Nirav
VanLeeuwen & VanLeeuwen
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