State Transition Analysis of GSM Encryption Algorithm A5/1

Journal of Communications Software and Systems

关键词: a5/1 stream cipher;    cryptanalysis;    precomputed tables;    keystream;    initial state transition;    periodicity;   

DOI  :  10.24138/jcomss-2021-0104

来源: DOAJ

【 摘 要 】

A5/1 stream cipher is used in Global System for Mobile Communication(GSM) phones for secure communication. A5/1 encrypts the message transferred from a mobile user. In this paper, we present the implementation of cryptanalytic on A5/1 techniques such as minimized state recovery for recovering the session key. The number of state transitions/updations needed for a state S to reoccur is maintained in the lookup table. This table can be used to recover the initial state from which the keystream was produced. Experiments are carried out for reduced version, full A5/1 cipher on 3.20 GHz machine, and cluster computing facility.

【 授权许可】

Unknown