[Cryptography] Quillon Graph: A private, post-quantum electronic cash system

Peter Gutmann pgut001 at cs.auckland.ac.nz
Fri Jan 9 03:03:03 EST 2026


Jerry Leichter <leichter at lrw.com> writes:

>We've gotten to see a few of their designs - Skipjack, for example.

Skipjack was a high-risk algorithm (meaning risk of eventual disclosure) that
was chosen because it was nothing like anything that actually mattered.  So
the one thing that's certain is that it's nothing like the designs they
actually use.

Also, we've only seen the abstract design, not the implementation, which is
the thing that matters.  I think the closest we've ever come to the latter is
the Fortezza API and drivers, which weren't necessarily the highest-quality
code ever written.  However even then it's unclear whether this non-TLA-use
TLA-written code is representative of TLA-only TLA-written code.

Peter.


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