AES/RSA encryption mechanism

1. Background knowledge In cryptography, encryption algorithms are divided into one-way encryption and two-way encryption. Symmetric encryption means that the same key is used for encryption and decryption, including AES encryption, DES encryption, etc. Asymmetric encryption refers to the use of different keys for encryption and decryption, including RSA encryption, etc. One-way encryption includes digest algorithms such as MD5 and SHA, which are irreversible. Two-way encryption includes symmetric encryption and asymmetric encryption. Two-way encryption is reversible, and the key to the ciphertext exists. 2. Introduction to AES AES: Advanced Encryption Standard (Advanced Encryption Standard) is a block encryption standard adopted by the U.S. federal government and is currently the most popular symmetric encryption algorithm. It is a new generation block encryption algorithm used to replace DES.

Yesterday I saw an English article [1] that showed how to use Python to implement the RSA algorithm. The logic of the code is the same as the previous article Understanding the RSA Algorithm. Friends who are not familiar with RSA can read the article Understanding the RSA Algorithm, which faces What is RSA, the mathematical principles of RSA are explained, and a simple example is given. It can be said that this is the easiest article to understand RSA on Quanzhihu (this comes from readers' comments). I ran the code provided in English and found that it could not encrypt Chinese, so I modified the encryption and decryption functions to support Chinese encryption and decryption. Today’s article will share how to use Python to implement the RSA encryption and decryption process to help you establish

How to use PHP and GMP to perform RSA encryption and decryption algorithm for large integers. The RSA encryption algorithm is an asymmetric encryption algorithm that is widely used in the field of data security. It implements the process of public key encryption and private key decryption based on two particularly large prime numbers and some simple mathematical operations. In the PHP language, the calculation of large integers can be realized through the GMP (GNUMultiplePrecision) library, and the encryption and decryption functions can be realized by combining the RSA algorithm. This article will introduce how to use PHP and GMP libraries to

1. Let’s talk about a cliché about accident interface safety. Before the Chinese New Year, I made a small H5 game about airplane battles. In the infinite mode, the user’s points need to be saved, because the Body used to pass parameters is visible. For the sake of interface safety, I The front-end and I agreed that the parameters to be passed are: the user's unlimited mode points + "a number we agreed upon" + the sum of the user id. After encrypting with Base64, the request is sent to the server and I decrypt it to get the user's unlimited mode points; as follows: { "integral":"MTExMTM0NzY5NQ==",} But during the Chinese New Year, the operation suddenly came to me and told me that the infinite mode points ranking list score was wrong: This is very strange, the second place is only one

How to use PHP and GMP to implement RSA encryption and decryption algorithm RSA encryption algorithm is an asymmetric encryption algorithm that is widely used in the field of information security. In practical applications, it is often necessary to use programming languages ​​to implement RSA encryption and decryption algorithms. PHP is a commonly used server-side scripting language, and GMP (GNUMultiplePrecision) is a high-precision mathematical calculation library that can help us perform large number operations required in the RSA algorithm. This article will introduce how to use PHP and GMP

With the development and popularization of the Internet, data security has received more and more attention. Encryption technology is a very effective means during data transmission and storage. Encryption can ensure the confidentiality and integrity of data. In PHP, AES256 encryption technology is a very popular encryption method. This article will introduce in detail its application method in the framework. Introduction to AES256 encryption technology AES (Advanced Encryption Standard) is the advanced encryption standard and is a modern popular encryption method.

RSA asymmetric encryption technology is one of the most popular and secure encryption methods currently. As a widely used programming language, PHP also has unique advantages in implementing RSA encryption. This article will introduce readers to how to use PHP to implement RSA asymmetric encryption technology. 1. What is the RSA algorithm? The RSA algorithm is an asymmetric encryption technology. It is usually used for data encryption and digital signatures. Its security is mainly based on a number theory problem, namely the difficulty of factoring very large integers in a very short time. RSA algorithm encrypted stream

How to write RSA encryption algorithm using Python? Introduction: RSA is an asymmetric encryption algorithm that is widely used in the field of information security. In modern communications, the RSA encryption algorithm is commonly used to encrypt and decrypt sensitive data. This article will introduce how to use Python to write the RSA encryption algorithm and provide specific code examples. Install the Python library Before you start writing the RSA encryption algorithm, you need to install the Python encryption library. It can be installed using the following command: pipinstallrsa generate