Message encryption using a hash function
US5483598A · kind A · utility
59Cited by
13References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1993 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Jul 1, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An encryption system employing a one-time key-pad uses a shared secret number and a one-way hash function with which both the originator and recipient of a message generate successive segments of a key-pad to encrypt and decrypt the message respectively. In one arrangement each key-pad segment is generated by applying the hash function to a combination of the secret number and the previous key-pad segment. In the other embodiment of the invention, each key-pad section is generated by applying the one-way hash function to a combination of the secret number and a corresponding segment of the ciphertext version of the message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.