Actually, I am working on a project to combine symmetric and asymmetric cryptographic algorithms. The shared secret key for AES will be generated through the Elliptic Curve Diffie Hellman Key Exchange (ECDH) Method. I have one question that ECDH will generate a shared secret key of 256 bit or mor...

I'm a layman trying to deepen my understanding of crypto and private messaging by building a (proof-of-concept) centralized, end-to-end encrypted messaging "platform". Messages are sent by devices to the "server" (running on my Pi inside my home network) where they are stored and from whence they...