3 ms·

The public key still needs to be shared.

• bouncycastle 7y ago
  Of course. The OP didn't mention which key, so assumed they are talking about the private key, especially when they mentioned out-of-bound sharing, usually terminology used for asymmetric cryptography. Public keys don't need to be shared out-of-band, in fact they are always published along with the transaction on the blockchain. (well technically, only the curve points and the hash are, but using these, we can re-create the public key)