Install latest/stable of signed
Ubuntu 16.04 or later?
Make sure snap support is enabled in your Desktop store.
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Generate an embeddable card to be shared on external websites.
This is a command line tool to sign and check (proprietary) signatures. It is based on Ed25519 and has optional AES encryption. You can exchange public keys to verify files and you can print a shared secret word that only you and the other user know.
Choose your Linux distribution to get detailed installation instructions. If yours is not shown, get more details on the installing snapd documentation.