Microprocessor apparatus and method for providing configurable cryptographic key size
US7536560B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2004 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Jan 16, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides an apparatus and method for performing cryptographic operations on a plurality of input data blocks within a microprocessor, where the size cryptographic key that is employed is programmable. In one embodiment, an apparatus for performing cryptographic operations is provided. The apparatus includes fetch logic and execution logic. The fetch logic is disposed within a microprocessor, and receives a cryptographic instructionsingle atomic cryptographic instruction as part of an instruction flow executing on the microprocessor. The cryptographic instructionsingle atomic cryptographic instruction prescribes one of the cryptographic operations, and also one of a plurality of cryptographic key sizes. The execution logic disposed within the microprocessor and is operatively coupled to the single atomic cryptographic instruction. The execution logic executes the one of the cryptographic operations. The execution logic has a cryptographic key size controller that employs the one of a plurality of cryptographic key sizes during execution of the one of the cryptographic operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.