Software-efficient message authentication
US5651069A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1994 |
| Grant date | Jul 22, 1997 |
| Priority date | — |
| Expiry date | Dec 8, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/84
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Fast message authentication code generation is achieved by preprocessing a secret key into an efficiently-computable representation of a hash function selected from a family of hash functions that share a characteristic property. The secret key is also mapped into a particular cryptographic transform. The hash function and the transform are used to generate the authentication code. In particular, the hash function is applied to the message to generate a hashed message. The cryptographic transform is then applied to the hashed message to generate a tag. The tag and possibly other information (such as the state of a counter) are then combined to create the authentication code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.