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A dna self-assembled structure and a symmetric encryption system based on it

A symmetric encryption and self-assembly technology, applied in the research field of DNA encryption and cryptography, which can solve problems such as difficult mathematical problems, lack of parallelism, and failure of encryption methods.

Active Publication Date: 2017-07-14
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Modern cryptography and quantum cryptography lack huge parallel capabilities, large-scale information search, and the encryption of a large amount of information is slow, and the ciphertext of these ciphers is easily intercepted by attackers and may be cracked
In addition to this traditional encryption methods rely on difficult mathematical problems which, once solved, render encryption methods useless

Method used

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  • A dna self-assembled structure and a symmetric encryption system based on it
  • A dna self-assembled structure and a symmetric encryption system based on it
  • A dna self-assembled structure and a symmetric encryption system based on it

Examples

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Effect test

Embodiment 1

[0030] Example 1: The basic process of forming a DNA self-assembly structure is as follows figure 1 shown.

[0031] Based on the DNA self-assembly structure, a symmetric encryption system is constructed. The encryption key used by the sender is named Ka. The sender uses Ka to convert plaintext P into ciphertext C, and sends this ciphertext to a receiver, who has the decryption key Kb. After receiving the ciphertext C, the receiver uses Kb to obtain the plaintext P through the decryption process. This encryption algorithm uses a one-time pad XOR operation. The XOR operation is a logic gate that performs an XOR operation, that is, the output is true (1) when only one input is true (1), and if all inputs are true (1) or the input is false (0) The output is false (0).

[0032] In the present invention, "code" is selected as plaintext for encryption and decryption. According to the ASCII password, this plaintext can be converted into a binary string "01100011 01101111 0110010...

Embodiment 2

[0039]Example 2: The DNA self-assembly structure is formed by hybridization of several different oligonucleotide single strands, the specific method is as follows: First, through the complementary recognition region, the single strand AB and BHQ hybridize to form a new DNA strand, here During the process, equimolar concentrations of single-chain AB and BHQ were added to the system (final concentration 3.75 pmol / L, TAE / Mg2+ buffer), and the mixture was left at 37°C for 2 hours. Next, add Q chains to the mixture at an equimolar concentration, and place at 37°C for 2 hours. In the experiment, in order to carry out the strand displacement reaction of XOR operation, the input strand (final concentration 3.75pmol / L) was added to the mixture containing DNA self-assembly, and reacted at room temperature for more than 2 hours, then PAGE electrophoresis and fluorescence could be performed. Result detection. For each sample, use a fluorescence detector to record the fluorescence value o...

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Abstract

The present invention relates to a DNA self-assembly structure and a symmetric encryption system based on it. The DNA self-assembly structure includes a bubble structure, which is formed by DNA nanostructure and chain Q through base pairing, wherein the DNA nanostructure is composed of DNA chain AB and chain Q. Chain BHQ chain hybrid formation, with the help of DNA's huge parallel capabilities, large-scale information search and single-molecule recognition capabilities, and the inherent advantages of using different detection methods in complex organisms to complete information transformation, transmission and detection, and based on nano The difficulty of technology in large-scale information search, the use of DNA self-assembly structure to realize encryption and decryption in stream encryption; the symmetric encryption system uses the specific recognition region of the AB chain and chain replacement technology to realize the XOR operation and complete One-time pad information encryption and decryption, so as to ensure the difficulty of password cracking and improve the security of information storage and transmission. The DNA self-assembly structure and the symmetric encryption system based on it can be widely used in various cryptographic fields.

Description

technical field [0001] The invention relates to the field of cryptography research, in particular to the field of DNA cryptography. Background technique [0002] Modern cryptography is based on various difficult mathematical problems such as non-polynomial time complete problems (NP-C). Quantum cryptography is a difficult physics problem based on the Heisenberg uncertainty principle. Modern cryptography and quantum cryptography lack huge parallel capabilities and large-scale information search, and the encryption of a large amount of information is slow, and the ciphertext of these ciphers is easily intercepted by attackers and may be cracked. Beyond that, traditional encryption methods rely on difficult mathematical problems that, once solved, render encryption methods useless. [0003] In recent years, DNA molecules have been widely used in computing, data storage, cryptography, etc. due to the advantages of huge parallelism and high-density information storage. DNA cry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/06
Inventor 杨静张成宋智超
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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