It all depends on who the message needs to be secure from, and for how long.
Sure, but for symmetric ciphers it's not hard to hit the "by anyone, for my lifetime" threshold. NIST does not define a sunset date for AES-256, for example.
Sure, but for symmetric ciphers it's not hard to hit the "by anyone, for my lifetime" threshold. NIST does not define a sunset date for AES-256, for example.