I am working in an environment with strict bandwidth requirements, and we need predictable bit lengths of the stuff we send. We need to broadcast ECDSA public keys, and we are using OpenSSL to generate them.
So will the prublic key lengths vary from private key to private key? Or will they be constant?
I noticed there are many output formats, like DER, and one with base4 encoded public key wrapped in headers. I would like the shortest possible public key, possibly in bit format, with predictable length. What is the best way?