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    Chapter and Conference Paper

    FFT Key Recovery for Integral Attack

    An integral attack is one of the most powerful attacks against block ciphers. We propose a new technique for the integral attack called the Fast Fourier Transform (FFT) key recovery. When the integral distingu...

    Yosuke Todo, Kazumaro Aoki in Cryptology and Network Security (2014)

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    Chapter and Conference Paper

    Compact Representation for Division Property

    The division property, which is a new method to find integral characteristics, was proposed at Eurocrypt 2015. Thereafter, some applications and improvements have been proposed. The bit-based division property...

    Yosuke Todo, Masakatu Morii in Cryptology and Network Security (2016)

  3. Chapter and Conference Paper

    Wide Trail Design Strategy for Binary MixColumns

    AES is one of the most common block ciphers and many AES-like primitives have been proposed. Recently, many lightweight symmetric-key cryptographic primitives have also been proposed. Some such primitives requ...

    Yosuke Todo, Kazumaro Aoki in Applied Cryptography and Network Security (2016)

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    Chapter and Conference Paper

    Division Property: Efficient Method to Estimate Upper Bound of Algebraic Degree

    We proposed the division property, which is a new method to find integral characteristics, at EUROCRYPT2015. Then, we applied this technique to analyze the full MISTY1 at CRYPTO2015. After the proposal of the ...

    Yosuke Todo in Paradigms in Cryptology – Mycrypt 2016. Malicious and Exploratory Cryptology (2017)

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    Chapter and Conference Paper

    Analyzing Key Schedule of Simon: Iterative Key Differences and Application to Related-Key Impossible Differentials

    The current paper analyzes the key schedule function of lightweight block cipher Simon, which was designed by NSA in 2013. In particular, a list of all iterative key differences is provided for all members of the...

    Kota Kondo, Yu Sasaki, Yosuke Todo… in Advances in Information and Computer Secur… (2017)