RFID Enabling Your Front Door

jkusnetz · 10-03-2006, 05:55 PM

Here is a DIY project for making a house door lock open using an RFID reader.

RFID Enabling Your Front Door

I'd like to explore modifying this to work with my Prius's FOB.

Does anyone have any pointers on what kind of RFID reader would work with Toyota's keyless entry?

I know something like this could be used for evil purposes, ie theft of the car, so there probably isn't too much public information out there.

But that said, does anyone have any thoughts?

ScottY · 10-04-2006, 09:46 AM

I believe Toyota uses TI's RFID system. Check out this site: http://rfidanalysis.org/
A team at Johns Hopkins University successfully hacked the TI RFID system. Just beware of security risks if you are using this for your front door.

jkusnetz · 10-04-2006, 11:42 AM

<div class='quotetop'>QUOTE(ScottY @ Oct 4 2006, 09:46 AM) [snapback]327771[/snapback]</div>

Quote:

I believe Toyota uses TI's RFID system. Check out this site: http://rfidanalysis.org/
A team at Johns Hopkins University successfully hacked the TI RFID system. Just beware of security risks if you are using this for your front door.
[/b]

Interesting link. I'm not too worried about someone using this to brake into my house. There are probably much easier ways to do that if someone was interested in getting in. I'm just looking into an easy way for ME to get in. Plus it would be a cool project to do.

I found on TI's RFID site: RFID/EPC Tehcnology Solutions that you can order evaluation kits. That might be interesting if I knew which one to order and if in fact TI did make the RFID for the Prius.

Maybe I should try cracking open my key fob and see what's actually written on the RFID. Anyone have any tips on opening the FOB without destroying it?

One thing though, the link above seems to be talking about passive RFIDs. Aren't the RFIDs we use on the Prius active?

ScottY · 10-04-2006, 12:29 PM

I THINK the coding algorithms for passive and active RFID are the same, just the hardware that's different. Active RFID tag has a power source like a battery (our key fob is an active RFID tag), while passive RFID tag does not.

Don't have time to look at the datasheet on TI's website.. at work now... maybe tonight... Looks like the higher frequency kit is the way to go. Everybody in the RFID industry is moving toward higher frequencies, there gotta be some advantages right? One I could think of is smaller antenna, which means smaller RFID tag size.

Keep researching on this man, you have the coolest mod I've seen on a Prius so far. And I've been always interested in RFID stuff. It'll be interesting to see what you come up with.

jkusnetz · 10-04-2006, 01:32 PM

<div class='quotetop'>QUOTE(jkusnetz @ Oct 4 2006, 11:42 AM) [snapback]327841[/snapback]</div>

Quote:

Maybe I should try cracking open my key fob and see what's actually written on the RFID. Anyone have any tips on opening the FOB without destroying it?

[/b]

Well I figured out how to open it up enough to get to the battery. I have a feeling the rest of the FOB is glued together and right now I don't want to risk destroying the thing to get to the cicuit board.

There is a sticker next to the battery which I may be able to use to hunt down more info.

MDL B31EG
FCC ID: MOZB31EG
IC:2584A-B31EG
TOKAI RIKA CO.,LTD.

I did a search fo B31EG and found someone trying to get an ebay FOB repgrogrammed at the dealer. He says it's transmitting at 313MHZ with 540ms bursts of data that his original FOB put out. I assume he must have some sort of reader to figure that out.

jkusnetz · 10-04-2006, 01:46 PM

<div class='quotetop'>QUOTE(jkusnetz @ Oct 4 2006, 01:32 PM) [snapback]327942[/snapback]</div>

Quote:

TOKAI RIKA CO.,LTD.
[/b]

http://www.tokai-rika.co.jp/en/products/vehicle/ss.html

I also tried the FCC ID search didn't seem to want to turn up anything.

oly_57mpg · 08-11-2007, 02:29 PM

Thread back from the dead!

<div class='quotetop'>QUOTE(jkusnetz @ Oct 4 2006, 01:46 PM) [snapback]327952[/snapback]</div>

Quote:

I also tried the FCC ID search didn't seem to want to turn up anything.
[/b]

What you really want is:
https://fjallfoss.fcc.gov/oetcf/eas/reports...nericSearch.cfm

And search for PENASAT2. Not the FOB's FCC ID. Since the fob is active and the FCC report didn't mention testing anything in the kHz range, you really want to read about the RFID readers.

The RFID readers in the Prius use 134.2 kHz.

The FOB's do not seem to have a rolling code or encryption. If you want to use your FOB to open the door to your house, then you just need to map the FOB's signature to some sort of authenticating system/micro-controller/whatever.

MaxLegroom · 08-11-2007, 10:10 PM

This sounds like a pretty interesting idea to me. Just when I was thinking that my condo doesn't have SmartKey...

**TonyPSchaefer** · 08-11-2007, 10:20 PM

If you really want to go over the top and do it up right, here's what you want:
https://www.hqs.sbt.siemens.com/fs/content/...10_30_010en.htm

And while you're at it, I'm sure your HVAC could use an overhaul:
http://www.sbt.siemens.com/bau/products/so...sight_apps2.asp

hill · 08-13-2007, 12:29 PM

The OP has a great idea. But it's been done already a hundred times over :P

http://www.smarthome.com/_/Door_Locks_Acce.../nav.aspx?No=72

. . . . . and then some.

10-04-2006, 12:29 PM	#4
ScottY Senior Member Join Date: May 2005 Location: Long Island, NY Posts: 1,245 My Car: 2005 Prius Package: #3 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	I THINK the coding algorithms for passive and active RFID are the same, just the hardware that's different. Active RFID tag has a power source like a battery (our key fob is an active RFID tag), while passive RFID tag does not. Don't have time to look at the datasheet on TI's website.. at work now... maybe tonight... Looks like the higher frequency kit is the way to go. Everybody in the RFID industry is moving toward higher frequencies, there gotta be some advantages right? One I could think of is smaller antenna, which means smaller RFID tag size. Keep researching on this man, you have the coolest mod I've seen on a Prius so far. And I've been always interested in RFID stuff. It'll be interesting to see what you come up with. __________________ 05 Millennium Silver Metallic, Package #3 (package with SKS and all airbags) mud flaps MFD hood bumper protector CAN-View with OBD-II function Coastal EV mod mesh grill DICE iPod integration + ground loop isolated audio in "Prius" license plate frame Thule roof rack and snowboard carriers (winter only)

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10-03-2006, 05:55 PM	#1
jkusnetz Join Date: Jan 2006 Posts: 53 My Car: Package: Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	Here is a DIY project for making a house door lock open using an RFID reader. RFID Enabling Your Front Door I'd like to explore modifying this to work with my Prius's FOB. Does anyone have any pointers on what kind of RFID reader would work with Toyota's keyless entry? I know something like this could be used for evil purposes, ie theft of the car, so there probably isn't too much public information out there. But that said, does anyone have any thoughts?

10-04-2006, 09:46 AM	#2
ScottY Senior Member Join Date: May 2005 Location: Long Island, NY Posts: 1,245 My Car: 2005 Prius Package: #3 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	I believe Toyota uses TI's RFID system. Check out this site: http://rfidanalysis.org/ A team at Johns Hopkins University successfully hacked the TI RFID system. Just beware of security risks if you are using this for your front door.

08-11-2007, 10:10 PM	#8
MaxLegroom Member Join Date: Jul 2007 Location: Newport News, VA Posts: 85 My Car: 2005 Prius Package: #9 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	This sounds like a pretty interesting idea to me. Just when I was thinking that my condo doesn't have SmartKey...

08-11-2007, 10:20 PM	#9
TonyPSchaefer Ruler of Omicron Persei 8 Join Date: May 2004 Location: Far-North Chicagoland Posts: 8,437 My Car: 2004 Prius Package: #9 Nominated 4 Times in 2 Posts TOTM Awards: 0 Friends: 16	If you really want to go over the top and do it up right, here's what you want: https://www.hqs.sbt.siemens.com/fs/content/...10_30_010en.htm And while you're at it, I'm sure your HVAC could use an overhaul: http://www.sbt.siemens.com/bau/products/so...sight_apps2.asp

08-13-2007, 12:29 PM	#10
hill High Fiber Member Join Date: Jun 2005 Location: South OC So Cal & the Flathead Valley MT Posts: 2,456 My Car: 2004 Prius Package: #9 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 3	The OP has a great idea. But it's been done already a hundred times over :P http://www.smarthome.com/_/Door_Locks_Acce.../nav.aspx?No=72 . . . . . and then some.