A German computer scientist has cracked the encryption algorithm that secures 80% of the world's mobile phones, but it's far from a practical attack.
Researcher Karsten Nohl, a former graduate student at the University of Virginia, revealed his decryption methods this week at the Chaos Communication Conference in Berlin, the largest hackers conference in Europe. Nohl and a team of two dozen other experts worked for five months to crack the security algorithm that protects Global System for Mobile communications.
To break the code, Nohl and the other researchers used networks of computers to crunch through the trillions of mathematical possibilities. The result was the development of a code book comprising 2 TB of data that's compiled into cracking tables. The tables can be used as a kind of reverse phone book to determine the encryption key used to secure a GSM mobile phone conversation or text message.
Before the latest hack, hundreds of thousands of dollars of computer equipment was needed to break the GSM code, mostly limiting hacking to government agencies. Nohl told the conference that someone with the code book could eavesdrop on GSM communications using about $30,000 worth of computer gear, making such illegal activity possible by many more criminal organizations. (more) (a5/1 Cracking Project)
Before the latest hack, hundreds of thousands of dollars of computer equipment was needed to break the GSM code, mostly limiting hacking to government agencies. Nohl told the conference that someone with the code book could eavesdrop on GSM communications using about $30,000 worth of computer gear, making such illegal activity possible by many more criminal organizations. (more) (a5/1 Cracking Project)
