From the article above:
After 21 years, the code that has kept the world's GSM networks safe from interception has been broken.
According to a 28 year old German cryptographer Karsten Nohl, speaking at a hacker conference in Berlin the Chaos Communication Congress, the encryption code has been deciphered.
Nohl and a group of cryptographers claim that they have broken and published the primary encryption code for GSM, using legal methods to break the A5/1 standard, and have made available a 'code book' of binary data that could be used to decipher the content of a call within hours or even minutes.
"This shows that existing GSM security is inadequate. We are trying to push operators to adopt better security measures for mobile phone calls," he said.
Let's see how this plays out in 2010, if the code book is released publically, or perhaps finds its way into not-so-nice hands.....