Apparatus and method for consistency checking public key cryptography computations
US7715551B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 2004 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Sep 3, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/122
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cryptographic system comprising: 1) a first Montgomery-based cryptographic engine that receives a first operand and a second operand and generates a first result and 2) a second Montgomery-based cryptographic engine that receives a first reduced operand derived from the first operand and a second reduced operand derived from the second operand and generates a second result. The second Montgomery-based cryptographic engine operates in parallel with the first Montgomery-base cryptographic engine. The cryptographic system further comprises a comparator for comparing the second result to a first reduced result derived from the first result and generating an error flag if the second result and the first reduced result are different.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.