Research And Implementation Of Privacy Protection Technology Based On Encrypted Two-dimensional Code

With the rapid development of e-commerce,the rapid development of China's express industry,the scale of express delivery industry has ranked first in the world.Behind the massive courier,but hidden huge security risks.Because the express sheet shows user sensitive information explicitly,resulting in the leakage of user privacy events emerge in endlessly.Express sheet leak problem brings security risks to individuals,but also restricts the rapid development of express enterprises.In order to solve the single leak problem of express sheet,this paper combines the Identity based encryption system with QR code technology,and studies the privacy protection technology based on encrypted two-dimensional code.The identity based encryption system(IBE)has a shorter key at the same security level compared to the common public key encryption algorithm.User public key can be any unique identification,such as cell phone number,e-mail account and so on,and does not need to bind user public key through digital certificate,which avoids complex certificate management.QR code has many advantages,such as large storage capacity,low cost,easy to read,strong fault tolerance,high reliability and high reliability.It is widely used in various fields.In this paper,the BF-IBE encryption technology is used to protect the privacy information,and the encrypted ciphertext information is stored in the QR code.Although using public key encryption technology to encrypt data is slower,but it is not suitable for application scenarios with large amount of information,especially for courier single privacy information protection scenarios.A two-dimensional code is introduced to store ciphertext in order to improve the overall efficiency of the actual application.In this paper,BF-IBE encryption technology and QR code technology are combined to design a privacy protection scheme based on encrypted two-dimensional code.The scheme uses a new user's private key distribution protocol(IC protocol)to solve the problem of key escrow and private key distribution.The scheme is applied to the field of express privacy protection,and new private face and new express business processes are designed,and specific implementation details are given under the Android platform.The results show that compared with the AIC protocol,the IC protocol adopted in block encryption scheme does not need to inverse operation,the multiplication operation is reduced once,the bilinear pairing operation is reduced by half,and the overall computation efficiency is increased by about 2 times than that of the AIC protocol.IC protocol for key management, the efficiency of encryption and decryption on the block encryption scheme and the BF-IBE scheme,the security on the elliptic curve discrete logarithm problem based on the applied field of express can effectively protect user privacy,can solve the contradiction between information encryption and express courier business processes,can be extended to other points block encryption applications.