There is proposed a method for block encryption in the error-correcting mode, which includes preliminary encryp-tion of data blocks followed by simultaneous key-dependent transformation of the intermediate ciphertext blocks and labels that introduce redundancy. For practical applications there is proposed implementation of the method, in which two or more redundancy labels are used. The first label is used for reducing probability of the falls decoding. The second label is used for reducing the number of checking variants of potentially possible errors. The error-correcting block ciphering produces the output ciphertext blocks having increased size. To cor-rect errors it is sufficient to compute only the value of the label. Recovering the intermediate ciphertext blocks and source data blocks are not required prior performing the error correction. Due to the last in the proposed method the performance of the decryption procedure is higher than in the known method-analog.

Authors: A. A. Moldovyan, A. V. Muravyev, D. N. Moldovyan

Direction: Instrument Engineering and Information-Measurement Technologies

Keywords: Block encryption, secret key, error correcting, encoding, decoding, error-correcting ciphering, pseudo-probabilistic encryption

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