Information encryption technology uses various technologies to ensure that electronic information technology will not be distorted or leaked during storage and transmission under the current network environment. Protect data.(Recommended learning:Web front -end video tutorial)
This technology constantly needs to ensure the integrity, authenticity, and reliability of electronic information data. Responsible for the process.
Generally speaking, the most effective information encryption method at this stage is to convert the original digital information (plaintext) into other regular digital information (ciphertext) according to a certain method (algorithm) , and then read the encrypted information in a certain way.
(1) Plain text: the original information data;
(2) Cipher text: the encrypted information data;
(3) Encryption method : To encrypt the data stream during transmission, three methods are generally used: link encryption, node encryption and end-to-end encryption;
(4) Encryption (decryption) algorithm: refers to the relationship between ciphertext and plaintext Rules and steps for realizing replacement or conversion, DES algorithm, RSA algorithm and IDEA algorithm are the three most commonly used encryption algorithms in information data communication at present;
(5) Key: refers to the encryption of information data (made by Variable parameters used in the process of changing plaintext into ciphertext) and decryption (from ciphertext into plaintext) directly affect the results of encryption and decryption of information data.
General information encryption technology and its application in computer network security
With the increasing popularity of computer technology and Internet technology, in order to further promote the development of Internet technology, encryption technology is particularly important. important. There are many types of Internet encryption technologies at this stage, but they can be roughly divided into symmetric encryption technologies and asymmetric encryption technologies.
Information encryption related technologies
When people use electronic devices, the information encryption technology they are most frequently exposed to is cryptographic algorithms. Cryptographic algorithms, also called ciphers, are essentially mathematical functions applied to encryption operations.
Most of the passwords used in the early days were restricted algorithm types. Restricted algorithms have played an effective role for a long time, but combined with the current needs of information encryption, restricted algorithms are obviously unable to meet the requirements;
When a large-scale user organization uses restricted algorithms, the confidentiality of passwords is difficult to guarantee. If a user accidentally leaks the password, other users must change the algorithm type in time, otherwise there will be a risk of information leakage. , from which we can also realize the limitations of the restricted algorithm.
Of course, currently, Internet information encryption technology has firmly solved this problem. The use of modern passwords requires key decryption. The keys of the user group can be arbitrarily changed in the vast and boundless key space. This The security attributes of information encryption are greatly enhanced.
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