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A security system and memory technology, applied in the field of RFID security systems, can solve problems such as hidden dangers
Inactive Publication Date: 2009-10-21
BEIJING ZHONGSHI XINHUA TECH
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[0026] In order to solve the potential safety hazard problem that RFID exists, the present invention provides a kind of RFID safety system, and this safety system comprises: the RFID chip of the tag memory password with Faraday cup and memory switch key is set, and the RFID chip with detector is set The reader is characterized in that the following improved asymmetric encryption algorithm is set between the RFID chip and the reader:
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Embodiment 1
[0068] For example, at first, find out three numbers, p, q, r,
[0069] [068] Wherein p, q are two different prime numbers, and r is a number that is mutually prime with (p-1)(q-1)......
[0070] [069] p, q, r these three numbers are the private key
[0071] [070] Then, find out m, so that rm==1mod(p-1)(q-1).....
[0072] [071] This m must exist, because r and (p-1)(q-1) are relatively prime, and can be obtained by the method of rolling and dividing.....
[0073] [072] Come again, calculate n=pq.......
[0074] [073] The two numbers of m and n are the public key
[0075] [074] The encoding process is, if the data is a, it is regarded as a large integer, assuming a
[0076] If a>=n, just a is represented as s carry (s<=n, usually gets s=2 ^ t),
[0077] [076] Then each digit is less than n, and then segmented coding...
[0078] [077] Next, calculate b==a^m mod n, (0<=b
[0079] [078] b is the encoded data......
[0080] The process of decoding is to calculate ...
Embodiment 2
[0107] To change a 64-bit plaintext input block into a 64-bit ciphertext output block, the key used is also 64 bits. The main flow chart of the entire algorithm is as follows:
[0108] Its function is to reassemble the input 64-bit data block bit by bit, and divide the output into two parts, L0 and R0. Each part is 32 bits long. The replacement rules are shown in the following table:
[0113] The 58th digit that is about to be input is changed to the first digit, the 50th digit is changed to the second digit, ..., and so on, and the last digit is the original 7th digit. L0 and R0 are the two parts after the transposition output. L0 is the left 32 bits of the output, and R0 is the right 32 bits. F...
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Abstract
In order to solve the potential security hazard problem existing in RFID, the invention provides a security system applied to an electronic tag. The security system comprises an RFID chip, a reader and an unsymmetrical cryptographic algorithm, wherein the RFID chip is provided with tag memory codes of a Faraday cup and a memory switching key; the reader is provided with a detector; and the unsymmetrical cryptographic algorithm with the following improvement is arranged between the RFID chip and the reader. The algorithm comprises the steps of initially permuting, inversely permuting, transmitting a Query authentication request to the electronic tag by the electronic tag reader, generating H(IDkIIR), putting forward a request for obtaining all electronic tag marks to a backend database by the electronic tag reader, automatically marking the electronic tag reader by the backend database, authenticating the electronic tag reader, verifying the electronic tag, and the like.
Description
technical field [0001] [001] The present invention relates to a logistics management field, more specifically, to a RFID security system used in logistics. Background technique [0002] [002] In recent years, RFID—radio frequency tag, also known as electronic tag, has been more and more widely used in the logistics industry. The most basic RFID system consists of three parts: electronic tags, readers, and antennas. The tag is composed of a coupling element and a chip. The tag contains a built-in antenna for communication with the radio frequency antenna; the reader is used to read or write tag information; the antenna plays the role of transmitting radio frequency signals between the tag and the reader. Some RFID systems can also be connected to an external computer (host computer system) through the reader's RS232 or RS485 interface for data exchange. [0003] The basic workflow of the system is: the reader sends a radio frequency signal of a certain frequency through the...
Claims
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