Method of verifying integrity of a pair of cryptographic keys and cryptographic device
US11606195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2019 |
| Grant date | Mar 14, 2023 |
| Priority date | — |
| Expiry date | Aug 24, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/30
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method of verifying integrity of a pair of public and private cryptographic keys within the additive group of the integers modulo N, with N being the product of two primary numbers p and q, the method including: calculating a candidate private exponent d′ corresponding to a private exponent d of the private key; and executing a test of integrity. The test of integrity includes a step for verifying the coherence of the candidate private exponent d′ with respect to a public exponent e of the public key and to the numbers p and q, the verification step involving a first multiple modulo of the public exponent e of the public key and a second multiple modulo of the public exponent e of the public key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.