Qualcomm Incorporated

Gregory G Rose

Philip Michael Hawkes

Ramin Rezaiifar

Raymond T Hsu

Parag Arun Agashe

Paul E Bender

Nikolai Konrad Leung

Arungundram C Mahendran

Alexander Gantman

Nikolai K N Leung

James Semple

Roy F Quick

Jun Wang

Roy Franklin Quick

Philip Hawkes

In a communications system, a method of transforming a set of message signals representing a message comprising the steps of first encoding one of the set of message signals in accordance with a first keyed transformation, a second encoding of the one of the set of message signals in accordance with at least one additional keyed transformation, a third encoding of the one of the set of message signals in accordance with a self inverting transformation in which at least one of the set of message signals is altered, a fourth encoding of the one of the set of message signals in accordance with at least one additional inverse keyed transformation wherein each of the at least one additional inverse keyed transformation is a corresponding inverse of at least one additional keyed transformation, and fifth encoding the one of the set of message signals in accordance with first inverse keyed transformation wherein the first inverse keyed transformation is the inverse of the first keyed transformation.

Method and apparatus for encrypting data in a wireless communication system

A method and apparatus for generating encryption stream ciphers. The recurrence relation is designed to operate over finite fields larger than GF(2) and is maximal length. An output equation generates the output based on a plurality of elements in the shift register used to implement the recurrence relation. The recurrence relation and the output equation are selected to have distinct pair distances such that, as the shift register shifts, no particular pair of elements of the shift register are used twice in either the recurrence relation or the output equation.

Method and apparatus for generating encryption stream ciphers

Method and apparatus for encrypting data in a wireless communication

An apparatus for providing authentication of a mobile station in a wireless communication system. The present invention takes the number dialed by the mobile station user and computes the 24 bit number (AUTH.sub.-- DATA) for authentication in accordance with a hashing function that has the following characteristics. The hashing function takes as its input at least the entire dialed digit string contained in the request for service and the number of digits. In a preferred embodiment, the ordering of the digits affects the result, as well as, the values of the digits. The preferred embodiment of the hashing function also accepts some or all of the mobile station identifier data. The function provides as output a number of suitable size for input to a second calculation of an authentication signature, such as the 24 bits required for AUTH.sub.-- DATA. The output number is created in such a way that there is a minimum likelihood that other sets of dialed digits may create the same result.

Method and apparatus for providing authentication security in a wireless

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Mortlake, Australia

Gregory G Rose