Security researcher Karsten Nohl has unveiled a suite of tools at the Black Hat hacker convention that hackers can use to listen to GSM mobile phone calls.
Nohl and fellow researchers announced late last year that they had cracked the A5 encryption protocol that protects messages on GSM networks. At the time they promised to release the tools they had used to do it, and they appear to have fulfilled that promise.
Nohl said GSM hacking was now entering "the script-kiddie stage", reported The Register. Nohl hoped that the GSM Association would now upgrade A5 security to avoid a repeat of the Wi-Fi hacking of a couple years ago, where people started cracking their neighbours' networks. That was resolved when Wi-Fi equipment makers provided WPA encryption. He hoped that GSM would follow a similar upgrade path.