Investigations in Brute Force Attack on Cellular Security Based on Des and Aes

In this paper the Brute force attack on cellular security based on DES and AES is carried out. It is shown that AES is more secure against brute force attack as compare to DES and A5 encryption algorithms. In the existing GSM network, A5 encryption algorithm is used which does not provide good security because of short length of encryption key. As a result, a new encryption algorithm is required to improve the security of GSM. So, AES algorithm is being proposed to improve the security of GSM instead of A5.