Enhancement of A5/1 encryption algorithm

14th International Conference on Science, Engineering and Technology

自然科学;工业技术

Elin Thomas, Ria^1 ; Chandhiny, G.^1 ; Sharma, Katyayani^1 ; Santhi, H.^1 ; Gayathri, P.^1

School of Computer Science and Engineering, VIT University, Vellore

632014, India^1

关键词: A5/1 algorithms;    Encryption algorithms;    Integral part;    Mobile communications;    Pseudo-random numbers;    Time complexity;    Various attacks;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/263/4/042084/pdf
DOI  :  10.1088/1757-899X/263/4/042084

来源: IOP

【 摘 要 】

Mobiles have become an integral part of today's world. Various standards have been proposed for the mobile communication, one of them being GSM. With the rising increase of mobile-based crimes, it is necessary to improve the security of the information passed in the form of voice or data. GSM uses A5/1 for its encryption. It is known that various attacks have been implemented, exploiting the vulnerabilities present within the A5/1 algorithm. Thus, in this paper, we proceed to look at what these vulnerabilities are, and propose the enhanced A5/1 (E-A5/1) where, we try to improve the security provided by the A5/1 algorithm by XORing the key stream generated with a pseudo random number, without increasing the time complexity. We need to study what the vulnerabilities of the base algorithm (A5/1) is, and try to improve upon its security. This will help in the future releases of the A5 family of algorithms.