http://bkg5ofjslnbyqvu55sjonpdyp3wmfsgq23u7vpk3wxn7ewgdeocpgwid.onion?page=article&article=Secure+Collaboration%3A+Encrypting+Group+Communication+with+GPG.html
Here’s how you can sign a message
and encrypt it for a group at
the same time: gpg --sign --encrypt --recipient
alice@example.com --recipient
[email protected] --recipient
[email protected] message.txt Recipients can then decrypt
the message
and verify
the signature to ensure its authenticity.