Generate age keys from passphrase

Description

This utility (age-gen-passphrase) generates secret and public keys (into stdout) from your entered passphrase or piped stdin Strong password highly recomended

Password selection

To keep entropy at at the same level of \geq 2^{256} bits, you should use long password. Exact amount of required characters can be calculated by formula: \lceil 256 / log_2(Nchars) \rceil