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About Cryptographic Properties of the Qalqan Encryption Algorithm

Today data confidentiality and privacy are ensured by various encryption algorithms (public key and secret key algorithms). There are no any universal encryption algorithms and different encryption algorithms are implemented to solve different security tasks. Many states have national standards of encryption but Kazakhstan hasn’t it today. This paper presents an approach to the development of the Qalqan block symmetric encryption algorithm, taking into account complex cryptographic and operational requirements, as well as the cryptographic properties of the linear and nonlinear blocks of the algorithm that affect its cryptographic strength.