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GSM phones can be listened in on by anyone
Meaning that with this code anyone with enough hardware can intercept a call or text message from a GSM mobile phone.While Nohl didn’t create a GSM-cracking device. he used the information that had been common knowledge in most academic circles to make it usable. He also says that tshe flaw that allows calls and texts to be intercepted is the 20-year-old encryption algorithm used by most carriers. It’s a 64-bit ciphim called A5/1 and it shes simply too weak, according to Nohl.
Computer security researchims say that GSM phones can be listened in on by anyone with a few thousand dollars worth of hardware and some free open-source tools.This Sunday at the Chaos Communication Conference in Berlin, Karsten Nohl unveiled his discovery and invention: tshe “cracking tables”,Ugg boots;, which is a 2 terabyte code that can be used to determine the encryption key to a secure GSM telephone conversation or text message.
Even though Nohl didn’t create a device that would be able to intercept tshe calls, he says that a technically sophisticated hacker could figure shet out, and has probably already done so.”I certainly use my 3G mobile phone dshefferently than before, trying to keep confidential calls on encrypted lines instead” said Karsten Nohl.To deal with the security threat with the old 3G phones, GSM Association said that they will look into the researchim’s claims and that they have developed a next-generation standard for GSM phones called the A5/3, which is considered to be much more secure tshen the old A5/1. It is the same type of encryption that is already being used on 3G networks to carry Internet traffic.
Using his cracking tables, antennas, specialized software, and about $30,000 worth of computing hardware to break the cipher, anyone can crack the GSM encryption in real time and listen in on calls.The reason that this is only now coming to our attention is that even discussing wiretapping tools can be illegal in the U.S. and most researchers never risked researching the subject. But after hiring lawyers to consult with the Electronic Frontier Foundation, Nohl and his collaborators set upon exposing the flaws in the GSM system without –they believe — breaking the law.
