The Research On The Optical Security Encryption System Base On One-time Pad

With the rapid development of information technology,information security and anti-counterfeiting have become the focus of attention of the issue,society and even individuals.Including identity cards,passports,bank cards,as well as check,high-precision goods,such as counterfeiting,to the country and individuals to bring serious security risks,so the search for safe and reliable anti-counterfeiting encryption methods has an extremely important practical and theoretical research significance.In recent years,the rapid development of optical stochastic phase coding anti-counterfeiting system is to encode anti-counterfeiting image into higher-order phase information,and the use of binary optical technology to make it into optical anti-counterfeiting mask,with conventional strength detector difficult to perceive the advantages,greatly promote the development of anti-counterfeiting technology,has a broad application prospects.However,the production of high-order phase anti-counterfeiting mask is limited to the development level and production cost limit of existing lithography technology,which makes it difficult to popularize this achievement.In this paper,the traditional two-dimensional barcode coding method is introduced into the optical stochastic phase coding technology,the image or text and other anti-counterfeiting information is encoded as a two-dimensional barcode,and then the two-dimensional barcode is encoded into a stochastic phase mask by using optical stochastic phase coding technology,and the high-definition decoding of the original anti The physical realization problem of traditional optical stochastic phase coding anti-counterfeiting system is solved,and the market-driven process of this technology is promoted.In addition,the phase anti-counterfeiting mask obtained in this paper is encoded as a two-dollar anti-counterfeiting barcode with black and white information,which further promotes the application of this technology.At the same time,the chaotic encryption algorithm is introduced into the improved optical stochastic phase coding system,and the "one Secret" is realized in a certain sense,which improves the security of the system.The main research contents of this paper:(1)On the basis of expounding the traditional stochastic phase optical coding technology,the recovery effect of POCS algorithm on grayscale image and two value image is compared emphatically,the two-dimensional barcode technology is introduced into the optical stochastic phase coding anti-counterfeiting system,and the recovery effect of anti-counterfeiting encoding information can be realized under the lower phase quantization order.(2)On the premise of ensuring that the amount of information is not lost,the quantified phase information is encoded into a two-element phase matrix with "0" and "1" distributions,and the anti-counterfeiting label is made,which realizes the purpose of characterizing the high-order phase quantization information only by using black and white two gray scale,and overcomes and simplifies the production process.(3)Constructing "one secret" key generation scheme based on chaotic system,and applying it to the improved stochastic phase system coding anti-counterfeiting system,realizes"one-time-pad" in a certain sense,and improves the security of the system.