Multifactor split asymmetric crypto-key with persistent key security
US7734045B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 2006 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Apr 8, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/302
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A processor generates an asymmetric crypto-key, such as an RSA crypto-key, which is associated with the user and includes a private key and a public key. It computes a first key portion based on a stored random number generation function, which has one or more constants such as a salt and/or iteration count, and a first value of a constant, and a second key portion based on the computed first key portion and one of the private key and the public key. It additionally computes another first key portion based on the stored random number generation function and a second value of that constant, and another second key portion based on the computed other first key portion and the one key. The computed first and second key portions and the computed other first and second key portions form first and second splits of the one key of the asymmetric crypto-key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.