60% Keyboard Kit

I have been using 60% keyboard. For some years, it was my practice buying a kit (of GH60 variant) around end of year (with Aliexpress or Taobao) and building it in new year.

Basically …

19 x 31 = 589 >= 587

I implemented safegcd256 for Gnuk. It uses signed 31-bit integers, and it does 19 iterations for p = 2**255 - 19.

Modular inversion

In the computation of X25519, we need to compute the modular inversion at the last step to get the value of x in …

Second-hand PC, Dell Optilex

I installed Debian Bookworm to this machine. It took a half of day.

I use USB Bloutooth Dongle of 0a12:0001 for the machine.

Comments on Bookworm

Mostly, the installation procedure and the configuration for Bookworm was as same as my installation of Buster.

In the …

Running the RNG to evaluate the output

In the Gomti collection, there are a few Verilog implementations for multiple targets. Currently, those implementations are under evaluation.

The RNG is "bare" version, with no conditioning component. That is, in the actual use case, it is assumed that adding conditioning component after …