Apparatus, system and method for detecting a loss of key stream system synchronization in a communication system
US8792642B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 10, 2012 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Sep 10, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0457
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus, system and method provides an out-of-synchronization detection by using a network layer checksum. A process operating at an upper layer verifies that a checksum embedded in a network layer header is correct before encrypting and transmitting a data packet containing the header and a payload. The data packet is received through a wireless communication channel at a receiver and decrypted. A calculated checksum is calculated on the received payload at the receiver and compared to the received checksum embedded in the header. A key stream used at the receiver for decrypting the received encrypted data packets is determined to be out of synchronization with a key stream used at the transmitter to encrypt the data packets if the calculated checksum is not equal to the network layer checksum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.