SIDH Library

SIDH is a fast and portable software library that implements a new suite of algorithms for Supersingular Isogeny Diffie-Hellman (SIDH) key exchange. The chosen parameters aim to provide 128 bits of security against attackers running a large-scale quantum computer, and 192 bits of security against classical algorithms. SIDH has the option of a hybrid key exchange that combines supersingular isogeny Diffie-Hellman with a high-security classical elliptic curve Diffie-Hellman key exchange at a small overhead.