Group key exchanges with failures
US7444514B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2004 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Apr 20, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Described are a method for generating a session key on demand in a network, a computer program element, a computer program product stored on a computer usable medium, and a computer device for executing the computer program product. The method generates a session key sk on demand in a network among n participating network devices with up to a number t of faulty devices. Each participating network device sends and receives a series of messages and performs the steps of: a) choosing a private and public key di, ei according to a public key encryption scheme, and broadcasting the public key ei to each participating network device; b) choosing a local contribution value yi from a multiplicative group Gq of size q; c) in each case of receiving the public key ej from one of the participating network devices, encrypting the local contribution value yi under the received public key ej to an encrypted contribution value yij and responding to the one participating network device the encrypted contribution value yij; d) receiving encrypted contribution values yji and deriving decrypted contribution values yj by applying the private key di; e) deriving a blinded session key bski from the decry…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.