Encryption, Post Quantum Cryptography, Elliptic Curve, Digital Signatures, Kyber.
by its (x, y) coordinates (each being 20 bytes long), you only need the ‘x‘ value (20 bytes) for the signature, and that value will be called ‘R‘. Now all you need is the ‘S‘ value. To calculate S, you must make a SHA1 hash of the message, this gives you a 20 bytes value that you will consider as a