Karsten Nohl, the celebrity mobile cryptography expert, has been at it again. Two years ago he caused a stir by showing that the secret code that protects GSM mobile handsets was easy to crack, leaving phone calls open to interception by third parties.
This year, he is due to show that handsets can also be hijacked to make unauthorised calls and send text messages, running up huge bills without their owners’ knowledge. GSM networks, which are vulnerable to this flaw, are used by around 80 per cent of the world’s mobile users. Read more