Suppose I have a public key for a particular user (perhaps extracted when using the new public key recovery formatnew public key recovery format included in P2SH, and BIP32 transactions).
- Is it OK the same key for both signing and encryption?
Since I'm obtaining the public key from a message, PS2H script, or BIP32 wallet I want to make sure that all secrets (Bitcoins, private keys, and privacy relating to BIP32) are maintained and no risk to privacy exists.
- What are some known, safe, (or unsafe) scenarios to use the same key for signing and encryption?