[sudo-access] magnetic card reader error codes as peoples' card hashes

[Yardena Cohen]

On Mon, Dec 18, 2017 at 7:45 PM, Yardena Cohen <yardenack at gmail.com> wrote:
> Update: I can't get this code to produce old-style hashes reliably.
> For some reason even minor tweaks to the old code are producing
> different hashes. It doesn't make any sense to me. I reverted all the
> changes and will try again later.

I'm still having the same problem. Seems like the hardware is just too
flaky, except when I revert the code it's not *quite* as flaky
anymore. Might be a timing issue? Hopefully not, because that'd make
most of our existing hashes worthless. Until we can get the card
reader can give reliable deterministic outputs, I don't have much hope
for this.