US8787578B2

5G,4G,3G,2G

Title

Method and apparatus for encrypting transmissions in a communication system

Application Number:

US20050269449

Publication Date:

22-07-2014

Family ID:

Application Date:

07-11-2005

Publication Country:

US

Priority Date:

30-09-1999

Declaring Company:

Abstract  Abstract

Method and apparatus for encrypting transmission traffic at separate protocol layers L1 L2 and L3 so that separate encryption elements can be assigned to separate types of transmission traffic which allows the implementation of different levels of encryption according to service requirements. Encryption elements use variable value inputs called crypto-syncs along with semi-permanent encryption keys to protect from replay attacks from rogue mobile stations. Since crypto-sync values vary a method for synchronizing crypto-syncs at the mobile station and base station is also presented.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent

Implicitly disclosed patent

Basis patent

Family member