If there's a reason to use encryption for messages or simple sign some files you share over untrusted services, you've to install gnupg
To make life a bit easier, I'd share some useful commandline tips:
To generate a new private/public key:
gpg --full-generate-key
... follow the prompt
gpg -k
gpg -K
the last one is for private keys
gpg --edit-key 0xMYKEY
> addkey
... follow the prompt
Export subkey (check its id by gpg -k
):
gpg -a --export 0xSUBKEY
gpg --import somekey.asc
Encrypt file using someones public key (for an instance mine):
gpg --encrypt -r g0tsu@dnmx.org secretfile.txt
gpg --decrypt secretfile.txt.gpg
You can download g0tsu.asc file, or copy it as a text:
-----BEGIN PGP PUBLIC KEY BLOCK-----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1io+VBARrHmQ9L5P1y15MKbtIoL+0pig0vuj2r7RB5d0p6kImqspqw7Z0ccghjD/
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t+VD4lh/LHtuGZzbnIC68c9locJzE5a736WeU3ctSe/B6DrELFNpoYzzShAc1INM
FJlnjy6MEZ0no8MnH9Zi4ncscs3f5+WhLCedE7YCNqUXvGtJvMwgq7/RXyGgipoL
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JFBl/4c3qQKvm+5N/iPogX1aCT5YsY1+TwgMSbSpwExa2r8YS9wMZXHP40NACnxD
r7MoCNBNS+2o2IqlkG6oMPyVltUzEGlftX6fLg==
=xzar
-----END PGP PUBLIC KEY BLOCK-----