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Asymmetric image encryption based on ECC and chaos

An encryption method and asymmetric technology, applied in image communication, electrical components, etc., can solve problems such as low encryption efficiency and weak security

Active Publication Date: 2019-01-25
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the present invention: Aiming at problems such as weak security or low encryption efficiency of existing image encryption methods, an asymmetric image encryption method based on ECC and chaos is proposed

Method used

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  • Asymmetric image encryption based on ECC and chaos
  • Asymmetric image encryption based on ECC and chaos
  • Asymmetric image encryption based on ECC and chaos

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Embodiment Construction

[0044] The implementation process of the present invention will be further described in detail below in conjunction with specific drawings and examples.

[0045] figure 1 is the encryption flowchart of this method, figure 2 is the decryption flowchart of the method.

[0046] The programming software used is MyEclipse 2015 CI, select image 3 A Lena image of size 512×512 is shown as the original interaction image. Using this method, Bob’s key generation steps are as follows:

[0047] Step K1: Select a key length of l =512-bit elliptic curve whose parameters are a =62948605579730632276664 21306476379324074715770622746227136910445450301914281276098027990968407983962691151853678563877834221834027439718238065725844264138, b =3245789008328967059274849 584342077916531909009637501918328323668736179176583263496463525128488282611559800773506973771797764811498834995234341530862286627和 p =89489622076502325516566028 151591534221626096440983545113445971872000570104135524399179343...

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Abstract

The invention relates to an asymmetric image encryption method based on an elliptic curve cryptosystem (ECC) and chaos, and belongs to the information security field. At present, with the rapid development of multimedia communication technology, how to protect the security of image content has aroused the common concern of industry and academia. At the same time, symmetric encryption algorithm hasthe problems of key management and security transmission. The invention provides an asymmetric image encryption method based on ECC and chaos. This method is based on Diffie-Hellman's key exchange protocol. First, in order to reduce the encryption times, the sender converts the pixels into a large integer. Second, she encrypts these large integers with ECC and chaos; Finally, an encrypted image is formed by encrypting a large integer. This method is an asymmetric encryption system, which effectively solves the problems of key management and secure transmission. Experiments show that the method is safe, efficient and has good encryption effect.

Description

technical field [0001] The invention relates to an information encryption technology, in particular to an image encryption method. Background technique [0002] In fields such as military systems, e-government affairs, financial systems, and daily life, a large number of images are generated every day. In order to protect the content of these image information from being stolen, image encryption technology has attracted extensive attention from academia and industry. Researchers have proposed various image encryption methods. However, some of these methods have been deciphered, some have weak security, some have low efficiency, some have difficulties in key transmission and management, and are unsatisfactory. [0003] In order to improve the security and efficiency of image encryption and ensure the safe and efficient transmission of images, an asymmetric image encryption method based on ECC and chaos was designed by combining Elliptic Curve Cryptosystem (ECC) and chaos th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/32
CPCH04N1/32272
Inventor 张晓强王雪松赵卓影
Owner CHINA UNIV OF MINING & TECH
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