Channel coding as a cryptography enhancer

Authors:
Natasa Zivic;Christoph Ruland
Affiliations:
Institute for Data Communications Systems, University of Siegen, Siegen, Germany;Institute for Data Communications Systems, University of Siegen, Siegen, Germany
Venue:
WSEAS TRANSACTIONS on COMMUNICATIONS
Year:
2008

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Abstract

In this work, channel decoding is considered as a promising way for improvement of cryptographic functions. Use of MAC/H-MAC values and digital signatures is analyzed in a context of code concatenation, together with convolutional codes using MAP decoding algorithm. Soft Input Decryption method, which uses L-values from channel decoder, presents an efficient method for integrating cryptography into decoding. The results of computer simulations that implement this method have been also presented. Additionally, the number of L-values verifications has been tested and compared with the theoretical results.