[ketralnis]

The paper recommends sentence based fingerprints.

I've used rfc1751[0] which is word-based rather than sentence-based, but it's pretty convenient. I use it for my password sharing tool[1] which creates prompts that look like

    === secrets.vm ===
    common name: secrets.vm
    fingerprint: b957e10c998faa9909cff3ba4ec35485d04708c3ecc7481fe14d7f07bc0229cd
    public key:  c15e697e4807793ef8a9461a7b2c6cf2266d1ec1480a594e83b54e7b75e07702
    public sign: f1db594eb55fe97657c57f2aa01afd1210a46d42d80d5552ac4d548162d4968e
    mnemonic:    AM ROBE KIT OMEN BATE ICY TROY RON WHAT HIP OMIT SUP LID CLAY AVER LEAR CAVE REEL CAN PAM FAN LUND RIFT ACME
    does that look right? [y/n]

where "mnemonic" is the rfc1751 mnemonic of the sha256 of the other fields and is designed to be shouted across a room.

I'd definitely be interested in a standardised sentence-based fingerprinting system akin to rfc1751

[0]: https://tools.ietf.org/html/rfc1751

[1]: https://github.com/ketralnis/secrets