Theta_dim4 library (python/sagemath and C)

SageMath (and later C) library for fast computation of 2-isogenies in dimension 4 with theta coordinates of level 2 based on [1]. This library is designed for cryptographic applications (SQIsignHD, SIDH attacks, Clapoti...).

Copyright (c) 2024, Pierrick Dartois.

This library is divided into:

• Theta_dim4_sage where the sagemath code base is located.
• Theta_dim4_C where the C code base is located (work in progress).

Further instructions may be found in the README.md files of each sublibrary.

References

[1] Pierrick Dartois, Fast computation of 2-isogenies in dimension 4 and cryptographic applications, IACR Cryptology ePrint Archive, Paper 2024/1180, 2024. https://eprint.iacr.org/2024/1180