Follow「Raymond Operations」 public account, and set it as「Starred」, or scan the QR code at the bottom to join the group chat, to get the latest content first and not miss out on exciting content. Introduction to Linux OpenSSL SSL and TLS Before understanding OpenSSL, we first need to know what SSL/TLS is. SSL (Secure Sockets … Read more
Introduction to Chen Shixiong 👋 Programmer Chen Shixiong, a popular Bilibili content creator, teaches in a clear and concise manner. 🚀 Previously worked as a senior backend developer at a leading company. 💻 Proficient in multiple languages including Java, Python, and JavaScript, with a long-term focus on reverse engineering, web scraping, and practical backend development. … Read more
As one of the important technologies for ensuring information security, asymmetric encryption plays a key role in various fields such as network communication and e-commerce. This article will take you deep into the understanding of asymmetric encryption. Public Key Cryptography In public key cryptography, the keys are divided into two types: the encryption key and … Read more
This article is an excellent piece from the Kuanxue Forum. Author ID on Kuanxue Forum: Awei IntroductionTo engage with cryptography before analyzing ransomware, some algorithms are indeed too complex, and my brother finds it quite challenging, so I won’t embarrass myself. There may also be unnoticed errors, and I hope everyone can point them out … Read more
AESNI is an SIMD instruction set developed by Intel for the x64 architecture, specifically designed to provide hardware acceleration for the AES encryption algorithm. Anyone who has some understanding of SIMD is generally aware of the existence of AESNI. However, due to the asymmetric structure of AES itself and the special design of AESNI, there … Read more
Introduction When we need to analyze firmware, the first step is to obtain the firmware. This can be done by downloading it from the official website, intercepting traffic to get the firmware, using a programmer to read the firmware from flash memory, or extracting it through serial debugging. After obtaining the firmware, the next step … Read more
1. AES (Advanced Encryption Standard) Core Principles 128-bit key: 10 rounds 192-bit key: 12 rounds 256-bit key: 14 rounds Block Cipher: The plaintext is divided into fixed-length blocks (blocks) for encryption. The block length of AES is fixed at 128 bits (16 bytes) Key Length: Supports128-bit, 192-bit, and 256-bit key lengths, corresponding toAES-128, AES-192, AES-256. … Read more
Java Security Mechanisms: Applications of Encryption and Decryption Algorithms In modern software development, data security is a crucial topic. Java provides various encryption and decryption algorithms to ensure the security of data during transmission and storage. This article will introduce commonly used encryption and decryption algorithms in Java and provide code examples to help beginners … Read more
06 In cryptography, the encryption algorithm E and the decryption algorithm D must meet the following conditions to ensure that plaintext P can be securely encrypted and correctly restored! Network Technology Section 1) Reversibility Condition The encryption and decryption must be inverse operations of each other, that is: D(E(P))=PExplanation: Applying the encryption algorithm E to … Read more
Java Security Mechanism: Implementation of Encryption and Decryption Algorithms in Java In modern software development, data security is a crucial topic. Encryption technology can protect sensitive information from unauthorized access. In this article, we will introduce how to implement basic encryption and decryption algorithms in Java. 1. Basic Concepts of Encryption and Decryption Encryption: The … Read more