Method and apparatus incorporating a one-way sequence for transaction and identity verification
US4393269A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1981 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Jan 29, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for verifying both the content of a transaction and the identity of the parties thereto. The system includes a plurality of terminals connected together over a common communication channel wherein a given pair of users located at different terminals on the system have exchanged a contract comprising a plurality of reference signatures each of which constitutes the final member of a one-way keyed signature sequence and each of which is a one-way function of each user's secret encryption key (K.sub.x) and a number (NUM) known to both parties. Each terminal connected to the system includes means for generating a multidigit ranking vector which is a cryptographic function of the entire message (DATA) tobe transmitted. Further means are provided for forming as many signature elements as there are digits in said ranking vector, the particular signature element being an intermediate member of a predetermined one-way keyed signature sequence specified by an associated digit of the ranking vector. Additional means are provided for initiating the generation of a separate keyed signature sequence to derive each signature element beginning with a starting element which r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.