[LINK] 125-134 KHz RFID

[stephen at melbpc.org.au]

Hmm, I understand the US Feds carry RFID id cards ..

 http://www.h4rdw4re.com/products/products.htm

H4RDW4RE product information: ProxPick Product Details

ProxPick is a versatile attack and defense tool for 125-134KHz RFID 
systems (collectively known as Prox), about the size of a playing card.  

It is able to read, copy, & playback almost all Prox-type tags, including:

• VeriChip
• HID Prox (multiple formats)
• Indala
• TI
• Q5
• T5555
• T5557
• EM4100
• HiTag2
• HomeAgain (pet chip)
• FriendChip (pet chip)

ProxPick has several different modes of operation, including:

• Read (it acts as an RFID reader to energize the tag)

• Sniff (another reader energizes the tag while the ProxPick listens in)

• Playback (it emulates the tag and presents the copied ID data)

• Shield (it emulates a tag but returns corrupt data)


In "Read" mode, ProxPick will have a read range of at least 12 inches 
(we're aiming for 18").  It supports high output power levels and can be 
used with an antenna wound around a door frame -- In this configuration 
it can read Prox tags that are carried through the doorway.  

In "Shield" mode it listens for readers:  when it detects a reader trying 
to scan its ID (or that of other tags you may have in your possession), 
it leverages the fact that Prox technology has no collision-avoidance 
strategy:  it sends out a signal which appears the same as a legitimate 
tag but does not contain valid data.  This confuses the readers, 
preventing them from reading your tags regardless of how much incident 
power is used (Prox cards are very difficult to shield from malicious 
reads using pasive technology; ProxPick provides far more effective semi-
active shielding).

In "Sniff" and "Shield" modes, the ProxPick is able to power itself 
passively from the reader (the same as an RFID tag does) and effectively 
work for unlimited time with no power source of its own.  The only limit 
to its longevity in Sniff mode is the size of its internal Flash memory 
(good for over a hundred thousand stored ID numbers); Shield mode has no 
such limitation.  ProxPick has both ICD2 and USB interfaces.  Its USB 
bootloader allows for firmware upgrades as well as tag data downloading 
for storage on a PC.  ProxPick also has high-power and low-power output 
connectors for different antenna configurations, as well as a versatile 
input stage that allows it to act as an amplifier for another Prox reader.

ProxPick will be available in kit form at the end of August 2009, for 
around $50.  Full schematics and source code will be released on 
H4RDW4RE.com under a GPL-compatible license as soon as the first 
production devices ship.


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