The Application Of QR Code Anti-counterfeiting Authentication Technology Base On Digital Signature In Productts Traceability System

To solve the problem of product quality and safety,many enterprises began to use the traceability system.The purpose of using the agricultural traceability system is mainly to supervise and restrict the agricultural management subject to a certain extent.In the event of problems with the quality of agricultural products,regulators can recall agricultural products and accountability by the system at the first time.Consumers can clearly know the purchase of agricultural products from the production to the sales of all aspects of information.Existing traceability system,however,did not completely solve these problems,most of the traceability system only have the function of information collection and distribution,there are still many deficiencies in the aspect of security and authentication.There are mainly two problems.First,many products can be obtained the information through the channel such as QR code,but QR code's coding system and data conversion process are in the open,so QR code didn't have anti-counterfeit effect,and the security and privacy congenital deficiencies.Second,the current traceability system,cannot do effective certification for those information publisher,system administrator,or some people of information provide can easily change the product information by system,once quality problem appears,it will be hard to effective accountability.In order to solve these two problems,this paper designs and experiments the QR code anti-counterfeiting authentication technology base on digital signature,and applies it to the traceability system of agricultural products.The main contents of this paper are as follows:(1)In order to solve the problem that the identity of the person who publishes the information cannot be effectively certified in the traceability system of agricultural products,this paper introduces the digital signature authentication technology.All enterprises use the digital signature authentication algorithm to generate a set of their own private key and public key.Each time the agricultural information is added,the enterprise uses the hash algorithm to generate the information summary,and then uses the enterprise's own private key to encrypt the information summary.The information is digitally signed,the system through the corresponding public key to the information through the certification,the information and the corresponding summary are stored in the system.In the event of product quality and safety issues,the system calls the database to extract information on agricultural products from all relevant enterprises.Since all the informationis digitally signed,the company will not be able to question the authenticity of all the information.(2)In view of the defects of the two-dimensional code itself,it is easy to be copied,forged and tampered with.In this paper,after the introduction of digital signature technology combined with image hiding technology.In the stage of generating the two-dimensional code,the department generating the two-dimensional code digitizes the corresponding information using its own private key,and then uses the image hiding algorithm to generate the two-dimensional code label and conceals the two-Dimension image.Consumers in the purchase of agricultural products,agricultural products can be scanned by carrying the two-dimensional code label to understand the product-related information,and can enter the two-dimensional code security authentication system,the system first extract the hidden two-dimensional code label,and then through Two-dimensional code generated by the enterprise public key to confirm the authenticity of product information.(3)The application of two-dimensional code security authentication technology based on digital signature is applied to Anhui province agricultural product quality safety supervision and traceability platform,through the simulation experiment and the practical application way to verify the feasibility of this study.The system mainly involves the following technologies: QR code technology,RSA digital signature algorithm,based on DCT transform image hiding algorithm.The main innovation is the application of digital signature technology in all aspects of the traceability system to ensure the authenticity of the information sources of agricultural products purchased by consumers and to ensure the integrity of information.The supervisory department can effectively track the participating enterprises and prevent illegal enterprises from producing On the other hand,the QR code label containing the signature information is hidden into the carrier two-dimensional code label,the security of the two-dimensional code is increased,and the carrier information capacity of the QR code is improved,The application of dimension codes is more extensive.