Computationally asymmetric cryptographic systems
US8358778B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2005 |
| Grant date | Jan 22, 2013 |
| Priority date | — |
| Expiry date | May 13, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
This invention is generally concerned with methods, apparatus and computer program code for a computationally asymmetric hash function, in particular for use with symmetric cryptographic algorithms. We describe a method of determining a computationally asymmetric hash function value, the method including: receiving input data to be hashed; computing an asymmetric value from said input data, said asymmetric value being computable by two methods, a first method employing at least one first parameter and a second method employing at least one second parameter, computation of said asymmetric value by said second method being faster than by said first method; and determining a computationally asymmetric hash function value using said asymmetric value. We also describe methods of providing a computationally asymmetric electronic signature from a symmetric cryptographic signature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.