Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2007-08-21
2007-08-21
Song, Jasmine (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C365S049130, C714S006130
Reexamination Certificate
active
09910227
ABSTRACT:
Methods and apparatus are disclosed for verifying the integrity of an index or result produced by a content-addressable or associated memory or other device. A pre-computed data protection field is stored, either as part of a returned index of a content-addressable memory or in a separate storage. In one implementation, a data protection operation is performed on all or part of the returned index and a comparison is made with a pre-computed data protection field. In one implementation, a copy of the masks employed by a ternary content-addressable memory and a set of pre-computed data protection fields are stored. A particular mask and pre-computed data protection field are selected based on the generated index. The original input value is then masked by the selected mask and provided to a data protection function. The result of this function is then compared to the selected pre-computed data protection field.
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Cisco Technology Inc.
Song Jasmine
The Law Office of Kirk D. Williams
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