在Android(Termux)上使用GnuPG

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pkg install gnupg

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gpg --help

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Commands:
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 -s, --sign                  make a signature
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     --clear-sign            make a clear text signature
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 -b, --detach-sign           make a detached signature
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 -e, --encrypt               encrypt data
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 -c, --symmetric             encryption only with symmetric cipher
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 -d, --decrypt               decrypt data (default)
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     --verify                verify a signature
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 -k, --list-keys             list keys
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     --list-signatures       list keys and signatures
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     --check-signatures      list and check key signatures
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     --fingerprint           list keys and fingerprints
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 -K, --list-secret-keys      list secret keys
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     --generate-key          generate a new key pair
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     --quick-generate-key    quickly generate a new key pair
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     --quick-add-uid         quickly add a new user-id
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     --quick-revoke-uid      quickly revoke a user-id
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     --quick-set-expire      quickly set a new expiration date
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     --full-generate-key     full featured key pair generation
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     --generate-revocation   generate a revocation certificate
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     --delete-keys           remove keys from the public keyring
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     --delete-secret-keys    remove keys from the secret keyring
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     --quick-sign-key        quickly sign a key
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     --quick-lsign-key       quickly sign a key locally
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     --sign-key              sign a key
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     --lsign-key             sign a key locally
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     --edit-key              sign or edit a key
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     --change-passphrase     change a passphrase
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     --export                export keys
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     --send-keys             export keys to a keyserver
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     --receive-keys          import keys from a keyserver
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     --search-keys           search for keys on a keyserver
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     --refresh-keys          update all keys from a keyserver
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     --import                import/merge keys
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     --update-trustdb        update the trust database
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     --print-md              print message digests
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     --server                run in server mode
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     --tofu-policy VALUE     set the TOFU policy for a key

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gpg --gen-key
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gpg --full-gen-key （个人喜欢）

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gpg --list-keys