Iskra Delta Partner: terminal emulator for YU Connect output?

Crazy thought: what if a Partner (CP/M, green screen) could print the verified status of a name? Not browsing the web, just a tiny read-only check client: it takes a name, fetches the signed snapshot over a serial link from a modern machine, verifies and displays: VERIFIED / UNKNOWN / CHANGED.

Why do it: fun, yes, but also a proof that the verification logic is simple enough for a 4 MHz processor. If we can verify on a Partner, we can verify anywhere.

Assumption: ed25519 is heavy but feasible, a few seconds per check. Does someone know a compact implementation in C or assembly that fits in 64 KB with room to spare?

There are tiny ed25519 implementations in C that fit in a few kilobytes, optimised for size, slow but fine. I'll dig up a reference and a licence list.

I have a Partner and a serial cable. Volunteering the machine and my garage.

Counterpoint: a verified result on a tiny device is only as good as the path that delivers the snapshot. Keep verification on the device, not the modern helper.

Agreed. The helper is just a dumb pipe, the Partner checks the signature itself. That is the entire point.

When it works, please invite me. I will bring tea and cake and sit in front of the green screen like a queen.