About this document
GSM Security: Cracking A5/1 Encryption by Shen King is a document available to read on EtoBox.
The document summarizes a talk given at Black Hat about intercepting and cracking GSM signals. It describes building a low-cost ($900) GSM scanner using off-the-shelf hardware like a USRP and details a practical attack that cracks the GSM A5/1 encryption in 30 minutes or less using FPGAs and rainbow tables. The attack passively intercepts 4 frames of encrypted communications to derive the internal state of the A5/1 cipher and decrypt future messages. The document warns that GSM security needs to improve as
- Author
- Shen King
- Language
- EN