Package csidh implements commutative supersingular isogeny-based Diffie-Hellman key exchange algorithm (CSIDH) resulting from the group action.

Package curve4q implements Diffie-Hellman operations using the FourQ curve at the 128-bit security level.

Package sidh is deprecated, it provides SIDH and SIKE key encapsulation mechanisms.

Package x25519 provides Diffie-Hellman functions as specified in RFC-7748.

Package x448 provides Diffie-Hellman functions as specified in RFC-7748.