CIRCL: Cloudflare Interoperable Reusable Cryptographic Library
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Updated
Apr 18, 2026 - Go
CIRCL: Cloudflare Interoperable Reusable Cryptographic Library
Supersingular Isogeny-Based Cryptography constructions (python-code library)
Implementation of cryptographic primitives in Go
The SQALE of CSIDH: Square-root velu Quantum-resistant isogeny Action with Low Exponents
Pure Rust implementation of the CSIDH cryptographic algorithm.
A PoC sagemath implementation of CTIDH, with some minor refinement
Auxiliary material for the paper: "Optimizations and Practicality of High-Security CSIDH"
Browser-based isogeny cryptography demo — elliptic curve isogenies, toy SIDH key exchange over GF(71), supersingular isogeny graph with random walk, Castryck-Decru torsion-leak attack (August 2022), CSIDH and SQIsign survivors. The scheme that fell and the math that survived. No backends. No simulated math.
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