Design And Implementation Of Multimedia Data Encryption Scheme For Academic Social Network

The academic social network is an informal communication platform based on the Web2.0 platform.In a specific network environment,the advantages of ordinary social networks are maintained,and the special needs of researchers are taken into account.Academic social networks provide scholars with research-oriented online activities that are both convenient and timely.The maj ority of teachers and students in the school's academic social network platform often involve a large amount of multimedia data related to key technologies and personal privacy.However,the existing academic social network platform lacks high-performance multimedia data encryption solutions,and it is urgent to further explore the trade-off between security and real-time.Aiming at the above problems,a one-time hierarchical encryption scheme for multimedia data based on data such as chat records is designed.This key links the encryption algorithm to the plaintext data,expanding the key space.Among them,the scheme of confidentiality priority in image hierarchical encryption adopts an encryption algorithm coupled with Baker mapping and 6-dimensional cellular neural network.Under the premise of guaranteeing the transmission rate,the security of the image data in the platform is enhanced.The real-time priority scheme first performs edge detection on the image,converts the image into a binary image,and then blocks the image and counts the image entropy of the sub-block to determine the sensitive sub-block.Finally,only the sensitive image sub?block is encrypted,which is effective to improve the efficiency of image encryption.For audio data,the privacy priority scheme eliminates the Baker mapping step compared to image encryption,and improves the encryption rate.The real-time priority scheme increases the filtering and noise reduction processing,reduces the edge detection link,and is more in line with the characteristics of the audio data,which has introduced Web Work module for video encryption,realized browser background encryption,and prevented JS single-thread encryption card.TFhrough multi-angle experimental analysis,the security and performance of the multimedia hierarchical encryption scheme are verified.The real-time priority multimedia encryption scheme has an advantage in speed,and the confidentiality priority scheme encrypts the data to have higher security,balancing the real-time and security requirements of multimedia data encryption in the platform.At present,the multimedia hierarchical encryption scheme has been applied in the academic social network platform to provide an efficient academic exchange platform for researchers.