Transmitting messages over a network
US6438691B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1998 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Oct 1, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of transmitting a message over a network from a sender to a receiver, comprises the steps of: taking a message (Coin) to be signed by the sender; signing the message into a digital signature (e, y) of the sender (steps 56,58), the digital signature being generated as a function of that message using public and secret signature generators (x, r) of the sender, a private key (s) of the sender, and other publicly known values (a, p, q); and transmitting the signed message over the network to the receiver (step 60); characterised in that: the message to be signed by the sender incorporates a first value (f(x)) which is a first predetermined function (such as a secure one-way hash function) of the sender's public signature generator (x) (step 48). It is thus possible that the incorporation of a proper first value can be verified by a receiver of the message who requires the sender to sign the message using a public signature generator, and furthermore that if a sender signs and transmits the same message more than once, the private key of the sender can be derived from the plurality of signed messages and a relationship between the public and private signature generators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.