Codes and cryptography
Fast correlation attacks on certain stream ciphers
Journal of Cryptology
Error Correction Coding: Mathematical Methods and Algorithms
Error Correction Coding: Mathematical Methods and Algorithms
Decrypting a Class of Stream Ciphers Using Ciphertext Only
IEEE Transactions on Computers
Theoretical analysis of a correlation attack based on convolutional codes
IEEE Transactions on Information Theory
Applications of LDPC Codes to the Wiretap Channel
IEEE Transactions on Information Theory
Wireless Information-Theoretic Security
IEEE Transactions on Information Theory
Tandem coding and cryptography on wiretap channels: EXIT chart analysis
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 3
LDPC codes for physical layer security
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
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In this paper we consider tandem error control coding and cryptography in the setting of the wiretap channel due to Wyner. In a typical communications system a cryptographic application is run at a layer above the physical layer and assumes the channel is error free. However, in any real application the channels for friendly users and passive eavesdroppers are not error free and Wyner's wiretap model addresses this scenario. Using this model, we show the security of a common cryptographic primitive, i.e. a keystream generator based on linear feedback shift registers (LFSR), can be strengthened by exploiting properties of the physical layer. A passive eavesdropper can be made to experience greater difficulty in cracking an LFSR-based cryptographic system insomuch that the computational complexity of discovering the secret key increases by orders of magnitude, or is altogether infeasible. This result is shown for two fast correlation attacks originally presented by Meier and Staffelbach, in the context of channel errors due to the wiretap channel model.