Weaknesses in the initialisation process of the Common Scrambling Algorithm Stream Cipher

Bartlett, Harry, Alhamdan, Ali, Simpson, Leonie, Dawson, Edward, & Wong, Kenneth Koon-Ho (2014) Weaknesses in the initialisation process of the Common Scrambling Algorithm Stream Cipher. In Winterhof, Arne & Schmidt, Kai-Uwe (Eds.) Lecture Notes in Computer Science, Springer-Verlag, Melbourne, VIC, pp. 220-233.

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The Common Scrambling Algorithm Stream Cipher (CSASC) is a shift register based stream cipher designed to encrypt digital video broadcast. CSA-SC produces a pseudo-random binary sequence that is used to mask the contents of the transmission. In this paper, we analyse the initialisation process of the CSA-SC keystream generator and demonstrate weaknesses which lead to state convergence, slid pairs and shifted keystreams. As a result, the cipher may be vulnerable to distinguishing attacks, time-memory-data trade-off attacks or slide attacks.

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ID Code: 74378
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Common Scrambling Algorithm, stream cipher, initialisation, state convergence, slid pairs, shifted keystream
DOI: 10.1007/978-3-319-12325-7_19
Subjects: Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > DATA FORMAT (080400) > Data Encryption (080402)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > Institutes > Institute for Future Environments
Current > Schools > School of Mathematical Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 Springer-Verlag
Deposited On: 29 Jul 2014 22:48
Last Modified: 08 Dec 2014 02:32

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