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A scrambling method for electronic coding of rfid label products

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

Inactive Publication Date: 2019-01-25
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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  • A scrambling method for electronic coding of rfid label products
  • A scrambling method for electronic coding of rfid label products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Scrambled 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] FFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFH

[0049] Scrambled random sequence:

[0050] E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638H

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

[0052] 111122232223111111112223222311111112223222311111111222322231111H

[0053] Phase and result:

[0054] E638E638E638E638E638E63800000000E638E638E638E638E638E638E638E638H

[0055] XOR result:

[0056] F729C41BC41BF729F729C41B22231111F729C41BC41BF729F729C41BC41BF729H

[0057] CRC calculation result (CRC16 generator polynomial is X 16 +X 12 +X 5 +1, the initial value of the register is FFFFH):...

Embodiment 2

[0059] Scrambled 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] FFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFH

[0065] Scrambled random sequence:

[0066] E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638E638H

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

[0068] Phase and result: E638E638H

[0069] XOR result: F729C41BH

[0070] CRC calculation result: D4C2H

[0071] The invention changes the EPC coded data read by the unauthorized reader, so as to prevent the unauthorized reader from locking a specific electronic tag or establishing a mapping relationship between the tag and the marked item, and stealing data assets. At the same tim...

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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 passive RFID electronic tag information security processing technology field , especially a scrambling method for electronic encoding of RFID tag products. Background technique [0002] Passive radio frequency identification system RFID identifies specific targets through radio signals and reads and writes relevant data. It has the characteristics of non-contact, long recognition distance, no power supply and maintenance-free tags, simple structure can be made completely sealed, and is suitable for harsh environments. . Since the passive radio frequency identification system adopts common protocols and standards, readers following the same standard can access tags following the same standard, so in the process of tag inventory, the reader sends out an inventory command, and the tag returns a random number RN, and the reader reuses This random number specifies the tag inventory, and the tag returns the tag identification code ...

Claims

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Application Information

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Patent Type & Authority Patents(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