Carriers close SIM security hole by hacking into their own SIMs

The flaw in the encryption technology used in some — not all — SIM cards, one which could allow a hacker to take over a mobile device, has been fixed in a clever fashion. Karsten Nohl of Security Research Labs in Germany, speaking at the Black Hat Security Conference on Wednesday, said that at least five carriers had closed the hole by using the same vulnerability to hack into their own SIMs and rewrite the software.