Fault attack on the DVB Common Scrambling Algorithm

Kai Wirt

Paper 2004/289

Fault attack on the DVB Common Scrambling Algorithm

Kai Wirt

Abstract

The Common Scrambling Algorithm (CSA) is used to encrypt streams of video data in the Digital Video Broadcasting (DVB) system. The algorithm uses a combination of a stream and a block cipher, apparently for a larger security margin. However these two algorithms share a common key. In this paper we present a fault attack on the block cipher which can be launched without regarding the stream cipher part. This attack allows us to reconstruct the common key and thus breaks the complete Algorithm.

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Keywords: block cipher cryptanalysis fault attack dvb paytv
Contact author(s): wirt @ informatik tu-darmstadt de
History: 2004-11-08: revised; 2004-11-05: received; See all versions
Short URL: https://ia.cr/2004/289
License: CC BY

BibTeX

@misc{cryptoeprint:2004/289,
      author = {Kai Wirt},
      title = {Fault attack on the {DVB} Common Scrambling Algorithm},
      howpublished = {Cryptology {ePrint} Archive, Paper 2004/289},
      year = {2004},
      url = {https://eprint.iacr.org/2004/289}
}