Optimized C library for cryptographic operations on curve secp256k1.
This library is used for consensus critical cryptographic operations on the Bitcoin Cash network.
Features:
secp256k1 ECDSA signing/verification and key generation.
secp256k1 Schnorr signing/verification (Bitcoin Cash Schnorr variant).
Additive and multiplicative tweaking of secret/public keys.
Serialization/parsing of secret keys, public keys, signatures.
Constant time, constant memory access signing and pubkey generation.
Derandomized ECDSA (via RFC6979 or with a caller provided function).
Very efficient implementation.
Suitable for embedded systems.
Optional module for public key recovery.
Optional module for ECDH key exchange (experimental).
Optional module for multiset hash (experimental).