By the same authors

Cryptanalysis of Semidirect Product Key Exchange Using Matrices Over Non-Commutative Rings

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Publication details

Title of host publicationMathCrypt 2021
DateAccepted/In press - 26 Jul 2021
Original languageEnglish


It was recently demonstrated that the Matrix Action Key Exchange (MAKE) algorithm, a new type of key exchange protocol using the semidirect product of matrix groups, is vulnerable to a linear algebraic attack if the matrices are over a commutative ring. In this note, we establish conditions under which protocols using matrices over a non-commutative ring are also vulnerable to this attack. We then demonstrate that group rings R[G] used in arXiv:1304.6572, where R is a commutative ring and G is a non-abelian group, are examples of non-commutative rings that satisfy these conditions.

Bibliographical note

11 pages

    Research areas

  • key exchange, cryptography, post-quantum cryptography, semidirect product, cryptanalysis

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