Data Encryption and Decryption Methods in C Language In modern computer science, the security of data has become increasingly important. Encryption and decryption are effective means of protecting sensitive information. In this article, we will introduce how to implement simple data encryption and decryption methods using the C language. What are Encryption and Decryption? Encryption: … Read more
Implementing a Simple Encryption and Decryption Tool in C In today’s article, we will implement a simple encryption and decryption tool using the C programming language. This tool is based on a very basic character substitution algorithm, allowing users to input a plaintext, encrypt it using a defined method, and then decrypt it back through … Read more
Developing a File Encryption and Decryption Tool in C Language In the modern information age, data security is particularly important. Today, we will learn how to develop a simple file encryption and decryption tool using the C language. This tool implements basic encryption and decryption functions through the XOR algorithm. 1. XOR Encryption Principle XOR … Read more
Introduction Hello everyone! If you are interested in encryption algorithms, then the DES algorithm is certainly a topic you cannot avoid. DES is like the classic sports car of the encryption world—debuting in 1977, it once enjoyed great popularity. Although it is no longer the safest choice today, DES remains a very interesting and useful … Read more
It is well known that the stability of the world’s financial infrastructure relies on the RSA encryption algorithm used by banks. This algorithm ultimately hinges on the difficulty of prime factorization. Since factorizing large numbers is a challenging task, almost impossible to accomplish manually, even computers would take thousands of years to crack a large … Read more
In the field of mathematics, I tried my best to explain the mathematical principles of cryptographic algorithms, but I failed, leading to the need to write a second version (Did someone not understand? Let’s try explaining the RSA encryption algorithm again). These are just arithmetic. Something that sounds sophisticated like elliptic curves, I thought I … Read more
The RSA encryption algorithm is the cornerstone of modern information security, widely used in network communication, data encryption, and e-commerce. However, with the rapid development of quantum computing, traditional cryptography faces unprecedented challenges. Especially in the era of Noisy Intermediate-Scale Quantum (NISQ) computing, the Variational Quantum Factorization (VQF) algorithm, based on quantum-classical hybrid methods, provides … Read more
Introduction This article summarizes various common encryption algorithms and encoding algorithms used in web scraping, detailing their principles and basic implementation methods in JavaScript and Python. When encountering JS encryption, you can quickly restore the encryption process. Some websites may have additional processing during encryption, but the general methods are similar. Common encryption algorithms: Symmetric … Read more
Reliable and Efficient: The Block Cipher Written by | Teacher Kang In the previous five issues, we discussed the intrinsic characteristics and structures of cryptography, as well as the relationship between cryptography and security. Starting from this issue, we enter the second part of this series – the
Last time, the author introduced some number theory knowledge. With this knowledge, we can understand the RSA algorithm. This is currently the most important encryption algorithm on Earth. 6. Steps for Key Generation We will understand the RSA algorithm through an example. Suppose Alice wants to communicate securely with Bob, how should she generate her … Read more