video created by Yuanbiao Zhou
In order to solve the data security problem of key businesses, it is essential to first make a comprehensive, reliable, secure and multi-level backup of the data system. In addition, all kinds of security products, no matter firewall, anti-virus, anti-hacker, anti-intrusion, are more or less responsible for protecting data. From the perspective of data protection, the broad concept of data security can be divided into three parts: data encryption, data transmission security and identity authentication management. Data encryption is to transform sensitive plaintext data into unrecognized ciphertext data according to the determined cryptographic algorithm. By using different keys, the same plaintext can be encrypted into different ciphertext using the same encryption algorithm. When necessary, you can use the key to restore the ciphertext data to plaintext data, which is called decryption. In this way, data confidentiality can be achieved. Data encryption is recognized as the only practical method to protect the security of data transmission and an effective method to protect the security of stored data. It is the most important line of defense for data protection in technology.
“Professional hackers are using more sophisticated techniques to try to steal valuable corporate data. One strategy involves making unwitting accomplices among employees-or employees of business partners-who allow intrusions into systems” (Sivarama, Krishnan, 2011). Data encryption technology is the most basic security technology, known as the core of information security. It was originally used to ensure the of data during storage and transmission. It replaces the protected information into ciphertext through transformation, replacement and other methods, and then stores or transmits the information. Even if the encrypted information is obtained by unauthorized personnel during storage or transmission, it can ensure that the information is not recognized by them, so as to achieve the purpose of protecting information. The confidentiality of this method depends directly on the cryptographic algorithm and key length.