Transmission Of Encrypted Social Media Information On Mobile Terminals

In the information age,social media platform based on mobile terminal has become an important way of information transmission.But the multimedia information is vulnerable to be attacked and acquired by many parties in the process of transmission,which leads to leakage.Therefore,the problem of multimedia information security cannot be ignored.How to ensure the security of multimedia data information when it is transmitted on the social media platform of mobile terminal has become a research hotspot.Research shows that encrypting multimedia information is one of the most effective ways to protect information.Due to the characteristics of large amount of information,high redundancy and strong correlation,multimedia data information encryption algorithm becomes more difficult and demanding.Considering the differences in hardware resources and operating system performance between intelligent mobile terminal and computer terminal,the existing multimedia information encryption algorithm has not been well applied in mobile terminal.In order to realize the encrypted transmission of social media information on mobile terminals,we need to balance the security and timeliness of encryption algorithm to ensure the security of encrypted transmission and the smooth operation of encryption system.In view of the above problems,the main research contents and innovations of this paper are as follows:1.To solve the security problem of symmetric cryptosystem depending on key when encrypting multimedia data,and the low efficiency of asymmetric cryptosystem encrypting multimedia data,this paper proposes a multimedia audio information encryption method based on hybrid system combining the advantages of symmetric encryption and asymmetric encryption.The sender uses two sets of Logistic chaotic systems to transform the position sequence of audio data sampling points and encrypt the value of audio signal XOR operation to get the audio ciphertext,and uses RSA encryption system to encrypt the chaotic system key with the public key of the authorized receiver to get the key ciphertext.The sender sends both the audio ciphertext and the key ciphertext to the receiver during transmission.The authorized receiver decrypts the key ciphertext with its own private key to get the correct chaotic key and then decrypts audio ciphertext.The unauthorized user cannot obtain the chaotic system key without the private key of the authorized receiver.Compared with the audio information encryption system which only uses a single system,using this encryption method to encrypt the audio file can solve the security problem of the key in the encryption transmission process,at the same time ensure the speed of encryption and decryption,and improve the efficiency of the secure transmission of information.2.To solve the problem that ciphertext is not sensitive enough to the key and the plaintext in the existing encryption algorithm,this paper proposes a color image encryption method based on chaostic system and hash,combining the characteristics of chaotic encryption algorithm and hash algorithm.According to the hash value of the original plaintext image,the key parameters of image encryption are set automatically.Two sets of Lorenz systems are used to transform the color image data into pixel scrambling and pixel diffusion.Compared with the existing encryption algorithms which have no correlation between plaintext and key,plaintext and ciphertext,this method can effectively resist statistical attack,exhaustive attack and differential attack.3.To solve the problem that the existing multimedia information encryption algorithm is difficult to be smoothly and efficiently applied to the encrypted transmission on the social media platform of the mobile terminal,this paper implements the encrypted transmission of audio and image in the social media information of the mobile terminal through the Qt development tool.In this paper,the hash value of the uploaded audio or image to be encrypted is calculated as the key of the encryption system to encrypt the multimedia plaintext data in chaostic system,then the public key of the authorized receiver is used to encrypt the chaotic key used in the multimedia plaintext encryption in RSA,and finally the multimedia ciphertext and the key ciphertext are transmitted to the receiver through the network channel.The authorized receiver uses its own private key to decrypt the key ciphertext by RSA and gets the correct chaotic key,then decrypts the multimedia data information correctly.This paper verifies the feasibility and practicability of the designed encryption algorithm through the implementation of the mobile terminal based on Android.In this paper,through the application of the encryption system to the mobile terminal experiments,we can see that using this scheme to encrypt the multimedia information on the mobile terminal social media platform can not only ensure the encryption speed,but also improve the security of the data information in the transmission process,and provide an information security transmission scheme for the mobile terminal based social media platform to resist some network information attacks hit.