Isogeny-based cryptography is famous for its short key size. As one of the most compact
digital signatures, SQIsign (Short Quaternion and Isogeny Signature) is attractive among …

Isogeny-based cryptography is cryptographic schemes whose security is based on the
hardness of a mathematical problem called the isogeny problem, and is attracting attention …

Abstract In 2023, Basso, Maino, and Pope proposed FESTA (Fast Encryption from
Supersingular Torsion Attacks), an isogeny-based public-key encryption (PKE) protocol that …

Given two linear codes, the code equivalence problem asks to find an isometry mapping one
code into the other. The problem can be described in terms of group actions and, as such …

SQIsign is a well-known post-quantum signature scheme due to its small combined
signature and public-key size. However, SQIsign suffers from notably long signing times …

Isogeny-based schemes often come with special requirements on the field of definition of the
involved elliptic curves. For instance, the efficiency of SQIsign, a promising candidate in the …

The threat of quantum computing has spurred research into post-quantum cryptography.
SQIsign, a candidate submitted to the standardization process of the National Institute of …

Digital signature is a fundamental cryptographic primitive and is widely used in the real
world. Unfortunately, the current digital signature standards like EC-DSA and RSA are not …

We give a new approach for finding large smooth twins. Those twins whose sum is a prime
are of interest in the parameter setup of certain isogeny-based cryptosystems such as …

The security of most public-key cryptosystems that are currently deployed rely on the
hardness of the discrete logarithm problem or of the integer factorisation problem. In 1994 …