[Noisebridge-discuss] RFID, TransLink/Clipper

[Jeffrey Malone]

On Wed, May 19, 2010 at 10:09 PM, Daniel Farina <drfarina at acm.org> wrote:
> For example, would it make any sense to make a translink-card driven
> door-(un)locking infrastructure? Or is that a silly idea?

I thought about doing that for Noisebridge at one point, before I knew
it worked on a 35mhz band.
The way the card works, it is likely to have a publicly readable ATR
-- sort of a provisioning number.  All the cards would have the same
ATR, but it would identify them as translink cards.  The unique id
should be encrypted like the rest of the data (if not, then seriously
shame on them -- that would be a terrible security hole).

So sadly, it is not too realistic to do a door lock using the
translink cards.  I am still vaguely tempted to set something up
though.  The bart ez rider cards use 13.5mhz, and so do many others
(oyster cards, for instance, and I think Boston's charlie cards).
Additionally, mifare cards cost ~$1, and can be purchased as small
keychains.
I have a 13.5mhz/125khz reader sitting around if you want to fuck with
it though.  Let me know..

Jeffrey