RFID: Radio Frequency Identification Amanda Di Maso Shreya Patel Tresit Tarko.
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Transcript of RFID: Radio Frequency Identification Amanda Di Maso Shreya Patel Tresit Tarko.
RFID: Radio Frequency Identification
Amanda Di MasoShreya PatelTresit Tarko
What is RFID? Overview
Radio Frequency Identification
Information stored on a tag or chip
Chip sends data over radio waves
Means of transmitting data from a portable device
An improvement over the bar code
Components of an RFID
Tag: microchip, antennae
Reader: case, 1+ antennae, power supply, electronics
Types of RFID Tags
Two Original Kinds – No Longer UsedInductively Coupled RFID tags
Older styleMade of glass, metal coils and an antennaeUsed to track large items shipped over long distancesPowered by a magnetic field from RFID reader
Capacitively Coupled RFID tags
Types of RFID Tags
Two Original Kinds – No Longer UsedInductively Coupled RFID tags
Capacitively Coupled RFID tagsNewer, cheaper versionDisposableConductive carbon ink instead of metal coilPrinted on paper or silicon
Types of RFID Tags
Three New Models- Commonly UsedAll store 2KB of data
Active Tag
Semi-Active Tag
Passive Tag
Types of RFID Tags
Three New Models- Commonly UsedAll store 2KB of data
Active TagBattery operated, cannot operate withoutRange of over 100 ft.Large, expensive, needs long term maintenanceLimited Lifespan (based on battery)
Semi-Active Tag
Passive Tag
Types of RFID Tags
Three New Models- Commonly UsedAll store 2KB of data
Active Tag
Semi-Active TagBattery operated, but uses reader power to
transmit radio wavesLong range, expensive, used for expensive items
Passive Tag
Types of RFID Tags
Three New Models- Commonly UsedAll store 2KB of data
Active Tag
Semi-Active Tag
Passive TagRelies on reader for all powerShorter range, up to 20 ft.Disposable, cheaperInfinite Lifespan
How does it work?
Two frequencies: 125 KHz and 13.56 MHz
Reader sends an electromagnetic signal
Signal received by and activates the tag
Tag powered by battery OR electrical current generated from readerMagnetic signal from reader sent over
metal/conductive coil in tag
Current allows tag to transmit data in form of radio wavesData usually converted to digital formDifferent data corresponds to own frequency
Different antennae on the reader receives radio signal
Interpret data based on the radio frequency
Sends data to a computer source
How does it work?
How does it work?
Data
Carrier
Modulated Signal
Modulations in signal, changes in frequency, are the components which carry the data from the tag to the reader
Carrier is the base frequency being sent by the tag to the reader, any deviations from the carrier frequency consists of the data being transmitted.
Common Applications of RFID
One of first uses: livestock IDTracked populations of cattleUsage increased after mad cow disease
Now common in pet Micro-chippingFour brands
ISO Conformant Full DuplexMost internationalConforms to ISO standards (international
organization for standardization)
Common Applications of RFID
One of first uses: livestock IDTracked populations of cattleUsage increased after mad cow disease
Now common in pet Micro-chippingFour brands
Trovan UniqueQuickly went out of usage due to patent
issues after birth in 1990Recently began distributing again with a
different tag
Common Applications of RFID
One of first uses: livestock IDTracked populations of cattleUsage increased after mad cow disease
Now common in pet Micro-chippingFour brands
FECAVA/DestronMost popular style microchip: HomeAgainUse hexadecimal tag numbers rather than
binary
Common Applications of RFID
One of first uses: livestock IDTracked populations of cattleUsage increased after mad cow disease
Now common in pet Micro-chippingFour brands
AVID microchipHas an encryption aspect to protect owner
information that makes it difficult to read by normal scanners
Still commonly sold
Common Applications of RFIDRetail SalesOn grocery store items such as shampoos
and DVDsAllows provider to know what is being sold
and at what rate
Public TransportationReplaces ticket sales; “smart cards”Allows user to access subway or bus and
have an account billed automaticallyNo contact needed for information
transmission
Common Applications of RFIDToll Road Payments
Allows frequent toll road travelers to bypass manual payment at each toll booth
RFID tag placed near windshieldSlow down, tag is read, toll is billed to an accountEZ Pass common
American brandFast Gas
Mobil SpeedpassPay without credit
Card or cashSwipe personal tag
Common Applications of RFIDThe Human Microchip?
http://www.youtube.com/watch?v=TqCxmXgnqKE
Privacy InfringementNew Human “microchip” considered privacy
infringementAccess to personal information and current
whereabouts 24-7
Questions?