Secure key exchange mechanism in a wireless communication system
US11843942B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2023 |
| Grant date | Dec 12, 2023 |
| Priority date | — |
| Expiry date | Mar 2, 2043 |
Classification
- Technology area (CPC —)General
Abstract
Security features for a wireless communications system including encryption and decryption of communications, secure key exchange, secure pairing, and secure re-pairing are provided. The encryption/decryption mechanism uses AES-256 block cypher with counter mode to generate blocks of cypher bits used to encrypt and decrypt communications between a master and devices. Session keys are generated using a random salt and a counter value. The random salt is generated using a secure random number generator. A master key or device key is also used in generating session keys. Impermanent session keys are used to encrypt/decrypt finite amount of data. Thereafter, the session key is replaced and cypher bits are generated using the new session key. A synchronized key jump procedure ensures that the master and device switch to the new session key at the same time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.