Author: Zen and the Art of Computer Programming
1 Introduction
1.1 Definition, background and purpose
In the Internet age, people increasingly rely on computers and Internet equipment for various transactional tasks, especially in the fields of finance, e-commerce, banking, etc., and more and more people begin to pay attention to information security. The first line of defense for information security is network security. The guarantee and maintenance of network security depends on many aspects, the most basic and important of which is user authentication.
1.2 Target audience
This article aims to provide readers with a "quick start" introduction to help readers understand what password-based authentication is, what it does and what it means. And put forward a solution - two-factor authentication (Two-factor authentication) as an effective way to achieve identity verification. I hope this article can help readers understand:
- What is password-based authentication? The necessity and significance of its existence.
- Why use password-based authentication? What advantages does it offer, and what are its limitations?
- How to use password-based authentication? What is the difference between two-factor authentication and other authentication methods? What is its principle and process?
- Finally, summarize the advantages and limitations of two-factor authentication compared to other authentication methods.
2. Explanation of basic concepts and terms
User Key (User Key) is used to encrypt user data and verify user access to data. The user key is selected and saved by the user himself, and cannot be obtained by others. There are two types of user keys: static keys and dynamic keys. Static keys refer to users directly storing their own keys, such as USB flash drives, for long-term storage. A dynamic key refers to a key that is automatically generated and distributed by the system. Every time a user needs to access a service, the key must be re-entered, which is not suitable for long-term storage.
Server Key (Server Key) The server is responsible for storing and managing user keys&#x