Method and apparatus for conducting crypto-ignition processes between thin client devices and server devices over data networks
US6263437A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1998 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Feb 19, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A crypto-ignition process is needed to establish an encrypted communication protocol between two devices connected by an insecure communication link. The present invention introduces a method of creating an identical secret key to two communicating parties is conducted between a thin device and a server computer over an insecure data network. The thin device generally has limited computing power and working memory and the server computer may communicate with a plurality of such thin devices. To ensure the security of the secret key on both sides and reduce traffic in the network, only a pair of public values is exchanged between the thin device and the server computer over the data network. Each side generates its own secret key from a self-generated private value along with the received counterpart's public value according to a commonly used key agreement protocol, such as the Diffie-Hellman key agreement protocol. To ensure that the generated secret keys are identical on both sides, a verification process is followed by exchanging a message encrypted by one of two generated secret keys. The secret keys are proved to be identical and secret when the encrypted message is successful…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.