The danish minister of IT- & science Birte Weiss has delivered a report on GSM security, use of encryption and interception. The main conclusions has been posted on the parliament website at http://www.ft.dk/Samling/20001/udvbilag/FKU/Almdel_bilag202.htm The document is in danish, but the main conclusions are: Tha algorithm A5/1 has not been broken in connection with use in a GSM-system. Unauthorized interception by breaking the encryption is not practically possible. The minister says, that the decision to use only 54 bits out of the 64 bits possible, by setting the last ten bits to zero, was made with reference to COCOM export regulations. GSM Association recommends that telecom providers start implementing use of the last ten bits. The four danish cell phone providers Tele Danmark (TDC), Mobilix, Sonofon and Telia has already started implementing the use of the last ten bits. This report is built in parts on the dutch minister of defences report to the dutch parliament on Echelon-like interceptions. Yours -- EOT
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Bo Elkjaer