Mediated key exchange between source and target of communication
US7594116B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2005 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | May 7, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3013
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system for communicating a message securely between a sender and a receiver. The sender provides a key server with a string specifying the receiver. The key server obtains a message key and a particular envelope encryption key corresponding with a particular envelope decryption key, encrypts the message key with the envelope encryption key (creating the envelope), and provides the envelope to the sender-client. The sender-client encrypts the message with the message key and provides it and the envelope to the receiver. The receiver-client receives these and asks an authentication server for the envelope decryption key. The authentication server obtains the envelope decryption key and provides it to the receiver. The receiver then decrypts the envelope with the envelope decryption key, to get the message key, and decrypts the message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.