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README.md

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+# 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: $\ceil*{256 / log_2(Nchars)}$