Abstract:

With the continuous development of network communication technology， intrusion attacks have become increasingly covert and difficult to detect， posing a serious threat to data security. To this end， a hybrid encryption method for biological information databases based on AES and Hash algorithms is designed. AES algorithm is used to map the Information mapping of biological data to the state matrix to obtain the key. After multiple rounds of byte replacement， row displacement， column confusion and round key addition， encryption operations are completed to obtain ciphertext. Use the MD5 function in the Hash algorithm and binary method to authenticate ciphertext data information. When an error message is found， trigger the reader to modify it to ensure data integrity. When a visitor sends an access request to the database， their identity information is reviewed through a reader. If the review is successful， they can access the database， and vice versa. Using AES algorithm to decrypt ciphertext， check if there is secondary identity information in the access permission identity of this file. If there is， read this data， otherwise， prohibit reading， and achieve mixed encryption of the two. The experimental results show that the proposed method can ensure the integrity of biological data information， and the time for data encryption， data decryption， and identity authentication is extremely short.

Key words: AES algorithm, Hash algorithm, bioinformatics database, secret civilization text, encryption operation