Author: Zen and the Art of Computer Programming
1 Introduction
In recent times, due to the continuous occurrence of domestic and foreign incidents and the adjustment of policies with the changing times, the traditional certificate system can no longer effectively resist and prevent information leakage in a short period of time. Some Internet companies are also facing urgent needs. A more complete data security system. In recent years, more and more Internet companies have chosen to deploy their systems on cloud platforms. In order to better protect user data security in the cloud environment, cloud vendors such as Alibaba Cloud provide a wealth of services and tool support. One of the important data encryption methods is the symmetric encryption algorithm RSA, which is based on the elliptic curve cryptography system. It is a public key private key encryption algorithm that can perform encryption and decryption operations at the same time. It is a public key encryption algorithm (public- key cryptography), with high security and fast operation speed. This article helps developers quickly get started with the symmetric encryption algorithm RSA by combining relevant tools provided by Alibaba Cloud, and provides readers with a complete guide from basic concepts to specific coding steps, as well as an in-depth understanding of application scenarios and future development directions. The article uses the Python programming language, and the code examples use the PyCrypto module. The details include the following chapters:
1. Background introduction
1.1 RSA encryption algorithm
RSA, the "Rivest–Shamir–Adleman" encryption algorithm, was proposed by Ronald Rivest (Rivest), Aranda Sabham (Shamir) and Edmund Adleman (Adleman). The public key and the private key are a pair of keys that match each other. If the public key is used to encrypt data, only the corresponding private key can be used to decrypt it; if the private key is used to encrypt the data, only the corresponding public key can be used to decrypt it. The RSA algorithm is based on the problem of large integer factorization and is the first practical algorithm among public key encryption algorithms.
1.2 Symmetric encryption algorithm
Symmetric encryption algorithm also known as confidential information