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Abstract We studied the symmetric block data encryption algorithm O'zDST 1105: 2009 and demonstrated the process of retrieving of secret parameters R, d using integral analysis (SQUARE-analysis). These parameters are based on the secret key and are used to construct substitution tables of the algorithm. We attacked a truncated version of the algorithm exploiting its vulnerabilities. We demonstrated the importance of a thorough examination of the mutual influence of operations in encryption algorithms.
Alisher Ikramov (Wed,) studied this question.
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