[mmastrac]

Interesting. FURISC looks like it cribbed a lot of ideas off ShapeCPU without referencing prior art. I find it hard to believe someone would be working on a libScarab-based CPU without seeing ShapeCPU as well.

Encrypted termination conditions were definitely in that implementation. The memory mux too.

[nindanaoto]

I'm also doubting that but before I knew Shape CPU, I believed because FURISC seems to be based on HEROIC, which is claimed to be the first processor emulation over homomorphic encryption. https://past.date-conference.com/proceedings-archive/PAPERS/... I think FURISC is more like HEROIC than ShapeCPU.

By the way, I feel sad for there is no publication of ShapeCPU. I guess that this is one of the causes of FURISC paper is lacking reference for ShapeCPU.

[mmastrac]

It looks like ShapeCPU originated around 2012 but only made it into posters, not papers. It's kind of a shame because I spent quite some time reproducing their work to confirm that it was viable, then building on top of it with HideCPU.

Lots of prior art in that implementation!