Secure communications in a wireless system
US6026165A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1996 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Jun 20, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C2201/61
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Disclosed are three major aspects relating to wireless transmission of encrypted data messages in a security system wherein the receiver stores locally an encryption key utilized by the transmitting device to encrypt the data message and the receiver uses the encryption key to decrypt an encrypted data message, and wherein a sequence number generator is used to synchronously track the message sequence at both the transmitter and receiver. A first major aspect involves encrypted device registration (learning) methods that are user-friendly and immune from detection by technically skilled intruders with special RF equipment, and periodic user-friendly changing of the encryption key per encrypted transmitting device in the system. A second major aspect involves encrypted device de-registration (unlearning, or deletion) that is likewise user friendly. A third major aspect of the invention allows the receiver to process encrypted and non-encrypted messages, interchangeably, within the same wireless security system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.