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This documentation describes the cryptography API and the syscalls that can be invoked to the operating system to use basic arithmetic and cryptographic functions. It is basically divided into:

• cryptography API which consists of signature algorithms, hash functions, message authentication codes and encryption algorithms
• syscalls which enable computations for GF(p) and GF(2ⁿ) arithmetic and efficient implementation of elliptic curves.

Here is a non-exhaustive list of supported algorithms:

• AES and DES in different modes
• ECDSA with a random or deterministic nonce
• EDDSA
• ECDH
• Schnorr signature with different implementations, especially the one used for Zilliqa and BIP-0340
• Multiple hash functions from SHA-2 and SHA-3 families as well as extendable output functions (SHAKE-128 and SHAKE-256)
• GROESTL and RIPEMD-160
• Keyed-hash Message Authentication Code

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