"an ec key" (elliptic curve) is just a detail, this can be done with any crypto library or utility - for example directly with the openssl command: https://stac

"an ec key" (elliptic curve) is just a detail, this can be done with any crypto library or utility - for example directly with the openssl command: https://stackoverflow.com/questions/15686821/generate-ec-keypair-from-openssl-command-line/51179147#51179147 https://stackoverflow.com/questions/15686821/generate-ec-key... embed the public part in your application and you can verify that something signed with the 'dgst' command and the private key really has been signed with the private key (which you obviously shouldn't publish) (Note if using plain commands there is more friendly than openssl, minify/signify are much harder to get wrong, but I'm not sure they're as easy to use programmatically in as many languages there are for libcrypto/sodium/etc; this is really just an example)