[Noisebridge-discuss] clipper card hacking

[Christie Dudley]

Hm.  If you're talking about the clipper card, that's cool, have fun
with that, but I can't work on that. (sorry to hijack the thread!)

If you're talking about the stuff I'm looking at - ISO 24730-5 - it
operates at 2.40-2.48GHz.  For those who know their spectrum, you'll
pick up that this is the same chunk of spectrum as:
Bluetooth
Zigbee
802.11
etc.

The ISM band is hot for new applications.

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



On Thu, Oct 7, 2010 at 1:43 PM, Ryan Rawson <ryanobjc at gmail.com> wrote:
> That's all really interesting.  I'm off to nyc for a week or so, so
> I'll have to pick up later... The current issue would be even just
> reading from the card.  The previous threads are noting that the cards
> are 35 mhz, so the question is, how hard would it be to acquire or
> construct/hack/modify a reader to read that frequency?
>
> On Wed, Oct 6, 2010 at 4:02 PM, Christie Dudley <longobord at gmail.com> wrote:
>> 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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>>>>> https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
>>>>>
>>>>
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>>>
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>