Real Time Cryptanalysis of A5/1 on a PC
FSE '00 Proceedings of the 7th International Workshop on Fast Software Encryption
Instant Ciphertext-Only Cryptanalysis of GSM Encrypted Communication
Journal of Cryptology
Reverse-engineering a cryptographic RFID tag
SS'08 Proceedings of the 17th conference on Security symposium
Attacks on the DECT Authentication Mechanisms
CT-RSA '09 Proceedings of the The Cryptographers' Track at the RSA Conference 2009 on Topics in Cryptology
An improved correlation attack on a5/1
SAC'04 Proceedings of the 11th international conference on Selected Areas in Cryptography
Conditional estimators: an effective attack on A5/1
SAC'05 Proceedings of the 12th international conference on Selected Areas in Cryptography
IEEE Transactions on Information Theory
Defeating any secret cryptography with SCARE attacks
LATINCRYPT'10 Proceedings of the First international conference on Progress in cryptology: cryptology and information security in Latin America
Interactive decryption of DECT phone calls
Proceedings of the fourth ACM conference on Wireless network security
Cryptanalysis of the Full AES Using GPU-Like Special-Purpose Hardware
Fundamenta Informaticae - Cryptology in Progress: 10th Central European Conference on Cryptology, Będlewo Poland, 2010
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The DECT Standard Cipher (DSC) is a proprietary 64-bit stream cipher based on irregularly clocked LFSRs and a non-linear output combiner. The cipher is meant to provide confidentiality for cordless telephony. This paper illustrates how the DSC was reverse-engineered from a hardware implementation using custom firmware and information on the structure of the cipher gathered from a patent. Beyond disclosing the DSC, the paper proposes a practical attack against DSC that recovers the secret key from 215 keystreams on a standard PC with a success rate of 50% within hours; somewhat faster when a CUDA graphics adapter is available.