What is RFID? Radio-Frequency Identification (RFID) is the use of radio waves to read and capture information stored on a tag attached to an object. A tag can be read from up to several feet away and does not need to be within direct line-of-sight of the reader to be tracked.
How does an RFID system work? An RFID system is made up of two parts: a tag or label and a reader. RFID tags or labels are embedded with a transmitter and a receiver. The RFID component on the tags has two parts: a microchip that stores and processes information, and an antenna to receive and transmit a signal. The tag contains the specific serial number for one specific object. To read the information encoded on a tag, a two-way radio transmitter-receiver called an interrogator or reader emits a signal to the tag using an antenna. The tag responds with the information written in its memory bank. The interrogator will then transmit the read results to an RFID computer program.
There are two types of RFID tags: passive and battery powered. A passive RFID tag will use the interrogator's radio wave energy to relay its stored information back to the interrogator. A battery powered RFID tag is embedded with a small battery that powers the relay of information. In a retail setting, RFID tags may be attached to articles of clothing. When an inventory associate uses a handheld RFID reader to scan a shelf of jeans, the associate is able to differentiate between two pairs of identical jeans based upon the information stored on the RFID tag. Each pair will have its own serial number. With one pass of the handheld RFID reader, the associate can not only find a specific pair, but they can tell how many of each pair are on the shelf and which pairs need to be replenished. The associate can learn all of this information without having to scan each individual item.
While this seems like nothing fancy, RFID blocking is something that needs more attention these days with so much identity theft and thieves finding new ways to get your information. The Protect and Store RFID Credit Card Sleeves Theft Protection
protects your credit cards and other sensitive data from identity thieves. Each RFID Credit Card Protector is weather and water resistant as well as Puncture and tear resistant. Of course, if you're purposely trying to get through; well you can. For instance, a pair of scissors will cut through, so it's not indestructible, it's just not as easily destroyed as it looks. I found that the sleeve worked well with just one credit card at a time per sleeve. It fits well around the card without being too tight or too loose. Each package comes with 12 card sleeves as well as stickers to help seal them closed if you`re interested in using those. The instructions on the package state that the stickers were to be used to differentiate what card went into what sleeve. So, if you have a wallet where your credit card pulls from the top, you could put a color on the top of the sleeve instead of the side. They are there to merely colorize the sleeves. While I can't tell you 100% how well it works without an RFID type device to try it out, I figured if anything it doesn't hurt just in case.
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Credit Card Sleeves Blocking RFID Transmissions Review