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    Article

    An improved key expansion algorithm based on a 2D discrete hyper chaotic map with memristor

    Key expansion plays an important role in symmetric block cipher. To generate desired number of round keys that satisfy irreversibility, parallelism and independence, we first constructed a 2D memristor-based d...

    Zhe Lin, Hongjun Liu in The European Physical Journal Special Topics (2024)

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    Article

    Bit-level image encryption algorithm based on random-time S-Box substitution

    To solve the shortcomings of traditional cryptography such as 3DES, AES and SM4 in encrypting multimedia information, we proposed a bit-level image encryption algorithm based on chaos and S-Box. First, we cons...

    Mengchen Wang, Hongjun Liu, Mengdi Zhao in The European Physical Journal Special Topics (2022)

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    Article

    Design an irreversible key expansion algorithm based on 4D memristor chaotic system

    The cryptanalysis results of AES show that its key expansion algorithm exists some weaknesses, such as the most round-constant are linear, and any round key can be derived from its previous or next round key, ...

    Ying Xu, Mengdi Zhao, Hongjun Liu in The European Physical Journal Special Topics (2022)

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    Article

    Critical state behaviors of a coarse granular soil under generalized stress conditions

    Critical state line (CSL) is the central concept in soil mechanics. A series of true triaxial compression tests under the constant- $${...

    Yang **ao, Yifei Sun, Hong Liu, Feng Yin in Granular Matter (2016)