Encryption, Post Quantum Cryptography, Elliptic Curve, Digital Signatures, Kyber.
You can note that you need both ‘k‘ (random number) and ‘a‘ (the private key) in order to calculate S, but you only need R and A (public key) to validate the signature. And since R=k*G and A = a*G and because of the trap door function in the ECDSA point multiplication (explained above), we cannot