gpg

install on mac

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brew install gpg

no default secret key

generate key

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gpg --gen-key

以下のエラーが出る場合には対処が必要

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Not enough random bytes available. Please do some other work to give

the OS a chance to collect more entropy! (Need 270 more bytes)

sudo apt-get install rng-tools

sudo rngd -r /dev/urandom

参考