26C3: Encryption code for DECT mobile phones cracked
At the time, however, the group was unable to successfully simulate an attack on the secret DSC. Now, the researchers have made further progress, which effectively means that phone conversations via DECT devices must be considered insecure even if a vendor has correctly implemented the standard's prescribed encryption features. According to crypto researcher Karsten Nohl, who has since joined the deDECTed team, one of the reasons for this is that engineers already worked sloppily when implementing the encryption code, reducing the initially planned additional process security measures such as redundant rounds in favour of a faster encryption.
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