The QR Code Research In Agricultural Produ Traceability Based On The Android Platform

With the continuous development of social economy and the continuous improvement of human living standards, there is a growing concern about food safety, therefore, food traceability is very necessary, which means when food safety problems arise, a series of information on food can be traced back and the link of the problem can be found so as to hold the relevant responsible person. At present, although it has begun to promote the product traceability system, imitation counterfeit is very easy to commit, which will not only harm the interests of the vast number of consumers, but also cause the food hygiene and safety problems.Consequently, a traceability system which can be easily accepted by people and hard to be copied is necessary.Two-dimensional code is a two-dimensional graphics that can store information in both horizontal and vertical directions. It is introduced to break through the defect that one dimensional code can only be stored in the horizontal direction. Two-dimensional code has large storage capacity, high coding density and wide coding range. What's more, compared to one-dimensional code can only encode numbers and letters, two-dimensional code can also encode the sounds,pictures,etc. With the security measures introduced in the two-dimensional code also has the characteristic of low cost and easy production. So the two-dimensional code can be applied to the field of traceability and anti-counterfeiting.In view of the shortcomings that the present traceability method is easy to be copied etc., this paper encrypts the unique code of the product using AES encryption technology and makes the QR two-dimensional code to be the carrier of the Encryption information. The AES encryption key is encrypted by the RSA encryption technology. Combine the high speed of the AES encryption-decryption and the not deciphering of the RSA encryption-decryption to ensure that the product is not copied.