System, method, and computer program for communicating a key recovery block to enable third party monitoring without modification to the intended receiver
US6061454A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1997 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Jun 27, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0894
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for communicating a key recovery block from a sender to a non-enabled receiver, without the danger of throwing the receiver into an indeterminant state, and without modifying the receiver. The method uses an unmodified communications protocol that has a standard method to receive and acknowledge arbitrary data. The sender sends a message using the standard method for arbitrary data, and includes in the message the key recovery block. The receiver responds with a standard acknowledgment message. The method thereby enables an entity coupled to the link, to monitor the key recovery block, even though the receiver is not enabled to process it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.