Linear cryptanalysis method for DES cipher
EUROCRYPT '93 Workshop on the theory and application of cryptographic techniques on Advances in cryptology
Fundamentals of Computer Security
Fundamentals of Computer Security
Cryptography and Network Security: Principles and Practice
Cryptography and Network Security: Principles and Practice
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The security data must keep security in the computer system. We encrypt these security data to produce encrypted security data. When we need, we decrypt these encrypted security data to produce original security data. We set encryption data table and use it to encrypt the security data. Each security data has key code in the file information data base. We use key code to insert encryption data table to the encrypted security data. When we want to get the original security data, we use key code in the file information data base to get encryption data table in the encrypted security data. We use encryption data table and decryption algorithm to decrypt the remaining encrypted security data and get the original security data. In this paper, we propose the method of verification to check whether the encrypted security data is modified or not. When we install these algorithms in the computer system to process, it is more secure.