Proceedings ArticleDOI
An analysis of the statistical self-synchronization of stream ciphers
Howard M. Heys
- Vol. 2, pp 897-904
TLDR
It is concluded that, although it can take significantly longer to resynchronize, SCFB mode can be used to provide self-synchronizing implementations for stream ciphers that are much more efficient than conventionalCFB mode and that have error propagation characteristics similar to CFB mode.Abstract:
In this paper, we examine a recently proposed mode of operation for block ciphers which we refer to as statistical cipher feedback (SCFB) mode. SCFB mode configures the block cipher as a keystream generator for use in a stream cipher such that it has the property of statistical self-synchronization, thereby allowing the stream cipher to recover from slips in the communications channel. Statistical self-synchronization involves feeding back ciphertext to the input of the keystream generator similar to the conventional cipher feedback (CFB) mode of block ciphers, except that the feedback only occurs when a special pattern is recognized in the ciphertext. In the paper, we examine the efficiency, resynchronization, and error propagation characteristics of SCFB and compare these to the conventional modes of CFB, output feedback (OFB), and counter mode. In particular, we study these characteristics of SCFB as a function of the synchronization pattern size. We conclude that, although it can take significantly longer to resynchronize, SCFB mode can be used to provide self-synchronizing implementations for stream ciphers that are much more efficient than conventional CFB mode and that have error propagation characteristics similar to CFB mode.read more
Citations
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Patent
Digital video content transmission ciphering and deciphering method and apparatus
TL;DR: In this article, a video source device provides a basis value to a symmetric ciphering/deciphering process to a video sink device, to which the source device is to provide a video content.
Patent
Method and apparatus for detection of loss of cipher synchronization
TL;DR: In this paper, the authors detect loss of stream cipher synchronization between a transmitter and a receiver in a video processing system by comparing the re-encrypted pixel value received from the receiver with the encrypted pixel value generated by the transmitter and detecting a loss of cipher synchronization when the values do not match.
Patent
Method and apparatus for decrypting a communication
TL;DR: In this article, a decryption scheme consisting of a key stream generator (109) generating a local decryption key stream and a synchronization value receiver (200) receiving key stream synchronization values is presented.
Dissertation
Control, synchronization and encryption
TL;DR: It is shown that flat dynamical systems completely define the set of all self-synchronizing systems and thus, enlarge the existing structures of self- Synchronizing stream ciphers.
References
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Book
Handbook of Applied Cryptography
TL;DR: A valuable reference for the novice as well as for the expert who needs a wider scope of coverage within the area of cryptography, this book provides easy and rapid access of information and includes more than 200 algorithms and protocols.
Book ChapterDOI
New approaches to the design of self-synchronizing stream ciphers
TL;DR: A method for combining several SSSCs is presented that allows to prove that the combined SSSC is at least as secure as any of the component ciphers, and an efficient algorithm is presented for finding a function of low degree that approximates a given Boolean function, if such an approximation exists.
Book ChapterDOI
Encryption with Statistical Self-Synchronization in Synchronous Broadband Networks
Oliver Jung,Christoph Ruland +1 more
TL;DR: The method described in this paper allows the use of encryption in broadband networks with transmission rates of 622 Mbit/s and the advantages of this method are the transparency of the encryption applied to the signal structure and signal format, and the automatic resynchronization after transmission errors.