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Code scrambling method for electronic code of RFID labeled product

An RFID tag and electronic coding technology, which is applied in the field of UHF passive RFID electronic tag information security processing, can solve the problems of wasting EPC coding interaction time, reducing system security performance, and less effective data volume of EPC coding, etc.

Inactive Publication Date: 2016-04-20
天津物联信源科技发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems brought about by this method are that the EPC code interaction between the reader and the tag carries little or no effective information, which wastes the time of EPC code interaction and reduces the data acquisition efficiency of the system; at the same time, due to the effective data volume of EPC code less, so that the one-card-one-password method calculated by EPC encoding degenerates into multiple cards-one-password or only one password
Reduced security performance of the system

Method used

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  • Code scrambling method for electronic code of RFID labeled product
  • Code scrambling method for electronic code of RFID labeled product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Scrambling random number N: N=1110001110011000=E398H

[0044] Scrambling factor K: K=00000110=6

[0045] Shift scrambling random number N': N'=1110011000111000=E638H

[0046] Mask control number M (expressed in hexadecimal): FCFFH (binary: 1111110011111111)

[0047] Mask control sequence (expressed in hexadecimal):

[0048] FFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFH

[0049] Random sequence of scrambling code:

[0050] E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638H

[0051] When the EPC code length is 16 words (expressed in hexadecimal):

[0052] 1111222322231111111122232223111111112223222311111111222322231111H

[0053] Phase and result:

[0054] E638E638E638E638E638E63800000000E638E638E638E638E638E638E638E638E638H

[0055] XOR result:

[0056] F729C41BC41BF729F729C41B22231111F729C41BC41BF729F729C41BC41BF729H

[0057] CRC calculation result (CRC16 generating polynomial is X 16 +X 12 +X 5 +1, the initial value of the register is FFF...

Embodiment 2

[0059] Scrambling random number N: N=1110001110011000=E398H

[0060] Scrambling factor K: K=00000110=6

[0061] Shift scrambling random number N': N'=1110011000111000=E638H

[0062] Mask control number M (expressed in hexadecimal): FCFFH (binary: 1111110011111111)

[0063] Mask control sequence (expressed in hexadecimal):

[0064] FFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFH

[0065] Random sequence of scrambling code:

[0066] E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638H

[0067] When the EPC code length is 2 words (expressed in hexadecimal): 11112223H

[0068] Phase and result: E638E638H

[0069] XOR result: F729C41BH

[0070] CRC calculation result: D4C2H

[0071] The present invention makes the EPC coded data read by unauthorized readers change, so as to prevent unauthorized readers from locking specific electronic tags or establishing a mapping relationship between tags and marked items, and embezzling data assets. At the same tim...

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PUM

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Abstract

The invention relates to a code scrambling method for the electronic code of an RFID labeled product. According to the method, according to a counting instruction sent by a reader, a label returns a random number, and the random number is a code scrambling random number shared by the reader and the label. The leftward cyclic shift of the code scrambling random number contained in the label is conducted according to the value of a scrambling factor, and then a shifted code scrambling random number is obtained. After that, multiple shifted code scrambling random numbers are successively arranged to generate a scrambling random sequence. Meanwhile, according to the value of a mask control number, a mask control sequence is generated. The mask control sequence and the scrambling random sequence are subjected to the AND operation, and the obtained result is subjected to the XOR operation together with the code of an electronic product. The above operation result is outputted to the reader. In this way, the scrambling process for the code of the electronic product is completed. According to the technical scheme of the invention, a non-authorized reader fails to obtain the scrambling factor and the mask control number, thus being incapable of recovering the correct code of the electronic product. The scrambling result for the code of the electronic product is varied each time, so that the label cannot be tracked. Therefore, all application systems are effectively isolated.

Description

Technical field [0001] The invention belongs to the technical field of UHF passive RFID electronic tag information security processing technology, in particular to a scrambling method for electronic coding of RFID tag products. Background technique [0002] Ultra-high frequency passive radio frequency identification system RFID uses radio signals to identify specific targets and read and write related data. It has the characteristics of non-contact, long identification distance, no power supply for tags, and maintenance-free. The structure is simple and can be completely sealed, suitable for harsh conditions. Environment and other advantages. Since the UHF passive radio frequency identification system adopts common protocols and standards, readers that follow the same standard can access tags that follow the same standard. Therefore, during the tag inventory process, the reader sends an inventory command, and the tag returns a random number RN. Read The device then uses this ran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10
CPCG06K7/10257
Inventor 杜江曾祥希
Owner 天津物联信源科技发展有限责任公司