rfid

RFID stands for Radio Frequency IDentification, a technology that uses tiny computer chips smaller than a grain of sand to track items at a distance. RFID "spy chips" have been hidden in the packaging of Gillette razor products and in other products you might buy at a local Wal-Mart, Target, or Tesco - and they are already being used to spy on people.

Each tiny chip is hooked up to an antenna that picks up electromagnetic energy beamed at it from a reader device. When it picks up the energy, the chip sends back its unique identification number to the reader device, allowing the item to be remotely identified. Spy chips can beam back information anywhere from a couple of inches to up to 20 or 30 feet away.

Some of the world's largest product manufacturers have been plotting behind closed doors since 1999 to develop and commercialize this technology. If they are not opposed, their plan is to use these remote-readable spy chips to replace the bar code.

RFID tags are NOT an "improved bar code" as the proponents of the technology would like you to believe. RFID technology differs from bar codes in three important ways:

1. With today's bar code technology, every can of Coke has the same UPC or bar code number as every other can (a can of Coke in Toronto has the same number as a can of Coke in Topeka). With RFID, each individual can of Coke would have a unique ID number which could be linked to the person buying it when they scan a credit card or a frequent shopper card (i.e., an "item registration system").

2. Unlike a bar code, these chips can be read from a distance, right through your clothes, wallet, backpack or purse -- without your knowledge or consent -- by anybody with the right reader device. In a way, it gives strangers x-ray vision powers to spy on you, to identify both you and the things you're wearing and carrying.

3. Unlike the bar code, RFID could be bad for your health. RFID supporters envision a world where RFID reader devices are everywhere - in stores, in floors, in doorways, on airplanes -- even in the refrigerators and medicine cabinets of our own homes. In such a world, we and our children would be continually bombarded with electromagnetic energy. Researchers do not know the long-term health effects of chronic exposure to the energy emitted by these reader devices.

Many huge corporations, including Philip Morris, Procter and Gamble, and Wal-Mart, have begun experimenting with RFID spy chip technology. Gillette is leading the pack, and recently placed an order for up to 500 million RFID tags from a company called "Alien Technology" (we kid you not). These big companies envision a day when every single product on the face of the planet is tracked with RFID spy chips!

As consumers we have no way of knowing which packages contain these chips. While some chips are visible inside a package (see our pictures of Gillette spy chips), RFID chips can be well hidden. For example they can be sewn into the seams of clothes, sandwiched between layers of cardboard, molded into plastic or rubber, and integrated into consumer package design.

This technology is rapidly evolving and becoming more sophisticated. Now RFID spy chips can even be printed, meaning the dot on a printed letter "i" could be used to track you. In addition, the tell-tale copper antennas commonly seen attached to RFID chips can now be printed with conductive ink, making them nearly imperceptible. Companies are even experimenting with making the product packages themselves serve as antennas.

As you can see, it could soon be virtually impossible for a consumer to know whether a product or package contains an RFID spy chip. For this reason, CASPIAN (the creator of this web site) is proposing federal labeling legislation, the RFID Right to Know Act, which would require complete disclosures on any consumer products containing RFID devices.

RFID Applications

The following list represents applications where passive tagging has been implemented over the last 2 to 3 years

Person Identification

Food Production Control

Blood Analysis Identification

Water Analysis

Refuse Collection Identification

Timber Grade Monitoring

Road Construction Material Identification

Toxic Waste Monitoring

Vehicle Parking Monitoring

Pigeon Flight Monitoring

Valuable Objects Insurance Identification

Oil Pipe Identification

Machine Tool Management

Gas Bottle Inventory Control

Duty Evasion

Asset Management

Stolen Vehicle Identification

Production Line Monitoring

Car Body Production

Parts Identification

Access Control

Beer Barrel Stock Control

Security Guard Monitoring

How does RFID work? A Radio-Frequency IDentification system has three parts:

• A scanning antenna
• A transceiver with a decoder to interpret the data
• A transponder - the RFID tag - that has been programmed with information.

The scanning antenna puts out radio-frequency signals in a relatively short range. The RF radiation does two things:

• It provides a means of communicating with the transponder (the RFID tag) AND
• It provides the RFID tag with the energy to communicate (in the case of passive RFID tags).

This is an absolutely key part of the technology; RFID tags do not need to contain batteries, and can therefore remain usable for very long periods of time (maybe decades).

The scanning antennas can be permanently affixed to a surface; handheld antennas are also available. They can take whatever shape you need; for example, you could build them into a door frame to accept data from persons or objects passing through.

When an RFID tag passes through the field of the scanning antenna, it detects the activation signal from the antenna. That "wakes up" the RFID chip, and it transmits the information on its microchip to be picked up by the scanning antenna.

In addition, the RFID tag may be of one of two types. Active RFID tags have their own power source; the advantage of these tags is that the reader can be much farther away and still get the signal. Even though some of these devices are built to have up to a 10 year life span, they have limited life spans. Passive RFID tags, however, do not require batteries, and can be much smaller and have a virtually unlimited life span.

RFID tags can be read in a wide variety of circumstances, where barcodes or other optically read technologies are useless.

• The tag need not be on the surface of the object (and is therefore not subject to wear)
• The read time is typically less than 100 milliseconds
• Large numbers of tags can be read at once rather than item by item.

In essence, that's how RFID works.

How is RFID used inside a living body?

RFID devices that are intended to be implanted inside a living body (like an animal or human being) have special requirements. They need to be encased in a special kind of casing that will not irritate or react with the living tissues that they are inserted into. The casing must also be transparent to the scanning radio-frequency beam that activates the chip. Some RFID vendors have created biocompatible glass for use in these applications.

One potential problem with being placed within a living organism is that the tiny RFID device may move around under the skin. This can be avoided by using special materials that actually let the surrounding tissue grow up to the casing and bond with it.

Because the radio-frequency waves that activate the microchip containing the identification number are only useful within a few feet (or less), the RFID chip is typically inserted very close to the surface of the skin.

The placement of the device is usually done with a hyperdermic-type needle. This method of insertion also dictates the shape and size of the device; implantable RFID devices are typically the size and diameter of a grain of rice. For dogs, the device is usually implanted between the shoulder blades.

RFID tags have been placed inside cows; some discussion of having all cows implanted with RFID devices has resulted from the recent scare with mad cow disease. Dog owners have used RFID tags to identify their pets rather than tattoos (the more traditional method).

RFID tags, like the VeriChip tag, can also be implanted inside human beings. See VeriChip RFID Tag Patient Implant Badges Now FDA Approved for more information.

What can RFID be used for?

RFID tags come in a wide variety of shapes and sizes; they may be encased in a variety of materials:

• Animal tracking tags, inserted beneath the skin, can be rice-sized.
• Tags can be screw-shaped to identify trees or wooden items.
• Credit-card shaped for use in access applications.
• The anti-theft hard plastic tags attached to merchandise in stores are also RFID tags.
• Heavy-duty 120 by 100 by 50 millimeter rectangular transponders are used to track shipping containers, or heavy machinery, trucks, and railroad cars.

RFID devices have been used for years to identify dogs, for a means of permanent identification. Dog owners had long used tattoos, permanent ink markings, typically on the ears. However, these can fade with age and it may be difficult to get the animal to sit still while you examine him for markings.

Many musical instruments are stolen every year. For example, custom-built or vintage guitars are worth as much as $50,000 each. Snagg, a California company specializing in RFID microchips for instruments, has embedded tiny chips in 30,000 Fender guitars already. The database of RFID chip IDs is made available to law enforcement officials, dealers, repair shops and luthiers.

Is RFID Technology Secure and Private?

Unfortunately, not very often in the systems to which consumers are likely to be exposed. Anyone with an appropriately equipped scanner and close access to the RFID device can activate it and read its contents. Obviously, some concerns are greater than others. If someone walks by your bag of books from the bookstore with a 13.56 Mhz "sniffer" with an RF field that will activate the RFID devices in the books you bought, that person can get a complete list of what you just bought. That's certainly an invasion of your privacy, but it could be worse. Another scenario involves a military situation in which the other side scans vehicles going by, looking for tags that are associated with items that only high-ranking officers can have, and targeting accordingly.

Companies are more concerned with the increasing use of RFID devices in company badges. An appropriate RF field will cause the RFID chip in the badge to "spill the beans" to whomever activates it. This information can then be stored and replayed to company scanners, allowing the thief access - and your badge is the one that is "credited" with the access.

The smallest tags that will likely be used for consumer items don't have enough computing power to do data encryption to protect your privacy. The most they can do is PIN-style or password-based protection.