This is a GnuPG-like unix program for encryption and signing that uses only quantum-computer-resistant algorithms: + McEliece cryptosystem (compact QC-MDPC variant) for encryption + Hash-based Merkle tree algorithm (FMTSeq variant) for digital signatures Stream ciphers used: ChaCha20, XSynd stream cipher, RC4 (for initial simplicity of implementation) CRHFs used: + Cubehash variants were selected for implementation ease, really clean design, quite good speed and flexibility of parameter choices. KeyID's are CUBE256 hashes of serialized public key. + ripemd128 for small hashes + tiger192 is used as an alternative for Cubehash for 192bit hashes + There's always a variant with SHA-256, SHA-384 or SHA-512. Signature algorithms: + FMTSeq with many possibilities and combinations of aforementioned CRHFs Encryption: MDPC McEliece on quasi-cyclic matrices - decoding is (slightly) vulnerable to timing attacks.