Encrypt/Decript short messages using ssh keys so you can share secrets with other people using unsafe channels (email, chat, ...)
For anybody to be able to send you secret messages they will need your public key.
Generate new key pair:
ssh-keygen -t rsa -b 4096
Pick a path to store the file. be careful to not overide an existing ~/.ssh/id_rsa
Share public key (*.pub) file with people that will send you "secrets".
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