nk

    With NKeys the server can verify identity without ever storing secrets on the server. The authentication system works by requiring a connecting client to provide its public key and digitally sign a challenge with its private key. The server generates a random challenge with every connection request, making it immune to playback attacks. The generated signature is validated a public key, thus proving the identity of the client. If the public key validation succeeds, authentication succeeds.

    To get started with NKeys, you’ll need the nk tool from https://github.com/nats-io/nkeys/tree/master/nk repository. If you have go installed, enter the following at a command prompt:

    Generating NKeys and Configuring the Server

    2. UDXU4RCSJNZOIQHZNWXHXORDPRTGNJAHAHFRGZNEEJCPQTT2M7NLCNF4

    The first output line starts with the letter for Seed. The second letter U stands for User. Seeds are private keys; you should treat them as secrets and guard them with care.