[Noisebridge-discuss] clipper card hacking

[Christie Dudley]

Oh, and links to EFF and ACLU discussions on the topic:

http://www.eff.org/deeplinks/2010/08/reading-writing-and-rfid-chips-scary-back-school
http://www.aclunc.org/issues/technology/blog/privacy_and_safety_questions_loom_over_federal_program.shtml

There's a significant chance the ACLUs probes will cause the school
district to backtrack and pull these, in which case equipment loans
aren't going to happen.  But to me, a system that does as much as this
and hasn't really been examined is worth at least poking about with.
It's groundbreaking!

Christie
_______
But wait... there's no FCC on the moon!



On Wed, Oct 6, 2010 at 3:59 PM, Christie Dudley <longobord at gmail.com> wrote:
> I don't feel like I can ethically hack these, having recently worked
> for the company.  I can explain a little bit, but probably not a lot
> more than you can find out for yourselves.
>
> I'm interested, however, in hacking another protocol that the EFF and
> ACLU are interested in hacking a new active RFID protocol that they're
> currently using on head start kids.  I have a few people thinking
> about it already, and there's a good chance we can get equipment
> loaned to us to hack.
>
> The protocol is still quite new.  ISO 24730-5 was only ratified in
> April of this year.  The Chirp Spread Spectrum bit encoding is pretty
> neat in that the encoding itself can be used to measure distance to
> the source.
>
> Christie
> _______
> But wait... there's no FCC on the moon!
>
>
>
> On Tue, Oct 5, 2010 at 11:51 AM, Bryan Beeley <bryan at beeley.org> wrote:
>> I was commuting using the Clipper/Translink card for a while, and I was
>> able to get it to work almost every time, as long as I was paying
>> attention.  It is just very particular about the way that you present
>> the card to the reader.
>>
>> I would be interested in working with others on understanding the card.
>> I also have software experience, and a fair amount of experience with
>> hardware credentials and readers.  However, my experience with building
>> custom hardware is fairly limited.
>>
>> Bryan
>>
>> On 10/04/2010 10:51 PM, Jonathan Lassoff wrote:
>>> On Mon, Oct 4, 2010 at 9:28 PM, Ryan Rawson<ryanobjc at gmail.com>  wrote:
>>>
>>>> It does seem that some swipes take longer than others, perhaps as low
>>>> as 300-500ms.
>>>>
>>>> Why would anyone build a high volume transit system based on this?
>>>>
>>> Personally, I find Clipper/Translink pretty unusable. In the times
>>> that I've tried to use it, it usually takes 1-2 seconds and 2-3 tries
>>> before it successfully tags.
>>>
>>> I bummed that Muni is canceling their beautifully colored passes and
>>> forcing people that want them to carry around RF cards. I liked being
>>> able to collect the colored passes for posterity.
>>> Now that I've started biking more, I've basically given up on Muni as a result.
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>>
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>