We have heard a lot that GSM is vulnerable to many attacks due to its 64-bit algorithm which cannot save it for long. However, till now no such big incident of cracking took place despite the fact that GSM is the most popular protocol for wireless communications and has been in use by billions of people. But here is a break, a security researcher (Nohl) is trying to build a table which will crack the GSM algorithm and here what he claims is that his efforts to crack GSM frequency hoping algorithm have succeed.
The purpose to spread the word is to make the carriers realize the importance of security in mobile networks. The researcher is publicizing a brute-force attack which when combined with GSM frequency selection algorithm can be used to create an easy and cheap procedure for eavesdropping on the phones which means the attack could be used to tap the call unnoticed.
