[ale] OT Fwd: Dc404-Chat New smart locks for your home

[Jim Kinney]

wrap your RFID cards in this stuff:

http://www.adafruit.com/products/1168

or go anti-emf crazy and buy a larger blob from:

http://www.lessemf.com/fabric.html


On Thu, Jun 20, 2013 at 1:32 PM, Alex Carver <agcarver+ale at acarver.net>wrote:

> On 6/20/2013 09:50, Ron Frazier (ALE) wrote:
>
>> On 6/20/2013 10:49 AM, William Bagwell wrote:
>>
>>> On Thursday 20 June 2013, Alex Carver wrote:
>>>
>>>> Ok, then use the bright light to illuminate the card from the edge.  If
>>>> you get the light just right you should see a square dimple in the back
>>>> of the card where the pocket for the chip is located.  On my card,
>>>> looking at the back of the card with the mag stripe on top, it is
>>>> located just 5mm (to the center of the dimple) below the bottom edge of
>>>> the mag stripe and 10 mm in from the right edge.  A bright light shining
>>>> across the card (the way you might shine light across a floor to look
>>>> for a lost screw or other tiny part) should highlight the dimple.
>>>>
>>> Bingo! Barley detectable 'pad' about 5mm square. Confirmed on the
>>> sacrificial
>>> card - metallic foil and has the 2mm chip with in.
>>>
>>> On a Chase Slate it is above the mag stripe and the curved "Blink" symbol
>>> points almost directly at it.
>>>
>>
>> I'm interested to know if that card had any writing, symbols, or legend
>> on it to indicate that you can use it wirelessly.  What's the point of
>> putting it in there if you don't notify the customer that he / she can
>> use it that way?
>>
>> I used one of those 1,000,000 candle power hand held spotlights like you
>> get at a tool or auto store to look through my cards.  The trick is to
>> hold the card in such a way so you don't blind yourself in the process.
>> I don't think any of them have the rf circuitry.  If they do, and I
>> haven't been informed by the bank, I will be rather annoyed.
>>
>> I thought about getting a cheap rfid reader from amazon to tinker with
>> and test the cards.  5 minutes of searching revealed a large enough
>> disparity of pricing and technology that I gave up on that for the moment.
>>
>> The following google search yields a large number of results that could
>> be interesting.  Haven't had time to sort through them.
>>
>> (destroy OR disable OR deactivate) rfid credit card
>>
>>
> Yes, if the card has the technology it's marked.  AmEx uses a symbol
> similar to the radio wave symbol you might see on a WiFi device (do a
> google search for Wifi Symbol and it's the curved lines that you find in
> most of the symbols).  Their marketing lingo is ExpressPay.  Visa and
> Mastercard should have similar symbols or branding on the card.  THey don't
> put the technology in all of their cards so it has to be obvious which
> cards do have it.
>
> I believe the RFID chip in a credit card is of the LF variety (kHz range).
>  There is also VHF and UHF RFID technology, too.  Some readers can handle
> all three types, others only one.  Sparkfun has a few readers, too.
>
> While doing a search I found a YouTube video with Adam Savage (of
> Mythbuster fame) explaining to an audience at a tech show why
> Discovery/Mythbusters aren't allowed to do an RFID episode (hint, the
> credit card companies told them no).
>
> I'm not a tinfoil hat type person but these things are hackable (same as
> the passport chips, too).  It wouldn't be much of a problem if the life
> cycle was shorter but the passports and credit cards are designed to hang
> around for a few years or more.  If a flaw is discovered that exposes
> information, there's a very large population of devices out in the field
> that have to get replaced quickly and that's not easy.
>
>
>
>
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-- 
-- 
James P. Kinney III
*
*Every time you stop a school, you will have to build a jail. What you gain
at one end you lose at the other. It's like feeding a dog on his own tail.
It won't fatten the dog.
- Speech 11/23/1900 Mark Twain
*
http://electjimkinney.org
http://heretothereideas.blogspot.com/
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