Method for preventing interception in radio frequency recognition system using back-scattering modulation technique

A radio frequency identification system and backscatter modulation technology, which is applied in the field of anti-interception in the radio frequency identification system, can solve problems such as inability to solve third-party interception, and achieve the effect of improving anti-interception ability, enhancing security, and realizing confidentiality
CN101359363AActive Publication Date: 2009-02-04TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2009-02-04

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Abstract

The invention discloses an interception prevention method which adopts the backscatter modulation technology in the RF identification system and belongs to the RF identification technical field in the wireless communication; the technical proposal includes that when the reader-writer sends an instruction to the label, the fixed frequency of the carrier signal is changed to be changeable frequency, or the fixed phase of the carrier signal is changed to be changeable phase; when the reader-writer receives the label reply and sends a signal to the label, the fixed frequency of the carrier signal is changed to be changeable frequency, or the fixed phase of the carrier signal is changed to be changeable phase; meanwhile, the constant amplitude of the carrier signal is changed to be changeable amplitude. The communication mode of the reader-writer and the label is improved to prevent the third party receiver from demodulating the correct signal and realize the encryption in the transmission process of the RF identification system so that the interception prevention capability of the RF identification system is improved effectively and the safety of the RF identification system is enhanced.
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Description

technical field

[0001] The invention belongs to the technical field of radio frequency identification of wireless communication, in particular to a method for preventing interception in a radio frequency identification system using backscattering modulation technology. Background technique

[0002] RFID (Radio Frequency Identification) technology in the field of communication is an automatic item identification technology that uses radio frequency for long-distance communication to identify items. Compared with traditional barcode technology, RFID technology has the characteristics of large data storage capacity, long reading distance, fast recognition speed, long service life, readable and writable, strong environmental adaptability, waterproof and antimagnetic, etc. These advantages make its application prospect very broad, and can be used in many fields such as industrial manufacturing, commercial supply chain management, public transportation management, commodity anti-c...

Claims

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