Cryptography Stack Exchange is a question and answer site for software developers, mathematicians and others interested in cryptography. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm trying to create a remote controller compatible with HiSec algorithm. It's so old that National (now Texas Instruments) discontinued NM95HS01/02 and docs are unavailable. Does anyone have the documentation that describe the algorithm code block? Maybe someone used them in an old project (at least 10 years ago) and already has the docs to implement the algorithm in a microcontroller.

share|improve this question
I found this from Google - it doesn't look like it has a full spec, but it might be a good jumping-off point. – pg1989 Oct 28 '13 at 19:20

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.