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US 2007/0177738 A1Published application
Secure two-way RFID communications
AssigneeImpinj, Inc., a Delaware Corporation
InventorsChristopher Diorio, Aanand Esterberg, Todd Humes
Life of this patent
Estimating the term…
Abstract
Methods and apparatus provide secure two-way (reader-to-tag and tag-to-reader) RFID communications. According to one aspect, a tag receives a noise-encrypted RF carrier signal from a reader and backscatter modulates it with tag information. Eavesdroppers cannot extract the tag information from the backscattered signal because it is masked by the noise encryption.
Claims24
An RFID reader for communicating with RFID tags, the reader comprising:
- a signal generator configured to generate an RF carrier signal and to modulate the RF carrier signal with a noise encryption waveform;
- and
- an antenna configured to transmit the noise-encrypted RF carrier signal to the tags.
An RFID reader, comprising:
- means for generating an RF carrier signal and for modulating the RF carrier signal with a noise encryption waveform;
- and
- means for transmitting the noise-encrypted RF carrier signal.
A method for reading an RFID tag with an RFID reader, the method comprising:
- modulating at the reader an RF carrier signal with a noise encryption signal to produce a noise-encrypted RF carrier signal;
- and
- transmitting the noise-encrypted RF carrier signal to a tag.
Dependencies are inferred from the claim text.