Rainbow - created by Jintai Ding and Dieter Schmidt - is an alterative candidate in the NIST final round for Post Quantum Cryptography (PQC). It is multivariate public key cryptosystem, and is based on the Oil-Vinegar signature scheme. Overall Rainbow - in its classic form - has a signature length of just 66 bytes. The public key size is 161,600 bytes and a private key size of 103,648 bytes. In this case we will use security level 1 (128-bit security) with the parameters of \((q, v, o_1, o_2)\) as \((16,36,32,32)\).
Related: [Kyber KEM][Kyber KEX][Dilithium Dig Sig Speed][Factoring signature (ECC)][Factoring signature (Logs)][Falcon Digital Signature][Rainbow Digital Signature][Dilithium Digital Signature][SPHINCS+][GeMSS]