‘Encryption’

International Radio Encryption Algorithm Reveals ‘Backdoor’

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International Radio Encryption Algorithm Reveals 'Backdoor'

The Terrestrial Trunked Radio (TETRA) standard, developed by the European Telecommunications Standards Institute (ETSI), is one of the most widely used radio encryption communication standards globally. It is extensively adopted by communication equipment manufacturers such as Motorola and Sepura, with applications spanning over 100 countries, primarily for encrypted communications in police, rescue, military, and critical … Read more

Implementation of the MD5 Encryption Algorithm

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Implementation of the MD5 Encryption Algorithm

1. Introduction Most projects today have high security requirements, especially financial systems, which require encrypted data transmission for inter-system interactions to ensure security. Therefore, I revisited some classic encryption algorithms. Today, I will implement a utility class for the MD5 encryption algorithm using the standard library in the Spring Security framework. 2. Overview of the … Read more

Vehicle Electronic Architecture – MCU Information Security Measures

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Vehicle Electronic Architecture - MCU Information Security Measures

I am a man in flip-flops, a long-term automotive electronics engineer in the magic city. As usual, I will share a piece of text I like to avoid becoming an engineer with high knowledge but low culture: After taking a shower on the weekend and changing into a new outfit, I went out but didn’t … Read more

Testing the MD5 Encryption Algorithm

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Testing the MD5 Encryption Algorithm

When collecting data from websites, we found that many sites encrypt their data, and one common encryption method is MD5. Regarding MD5 encryption, it is generally implemented according to the RFC 1321 defined MD5 algorithm standard. Today, we will test the MD5 encryption algorithm of a certain website. function c(e) {function t(e, t) {return e … Read more

Douyin Command Tutorial: Learn 3 Ways to Open Douyin Commands and Usage Rules in 1 Minute

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Douyin Command Tutorial: Learn 3 Ways to Open Douyin Commands and Usage Rules in 1 Minute

(Note: This article only provides process instructions for certain users’ consumption functions and does not serve as promotional guidance.) (Disclaimer: The content of this article is time-sensitive; please refer to the latest official guidelines for specific operations.) 📑 Table of Contents [Technical Principles] Encryption and Security Mechanism of Douyin Commands [Correct Operation SOP] 3 Officially … Read more

Bluetooth Mesh Open Source Chat Tool – Bitchat

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Bluetooth Mesh Open Source Chat Tool - Bitchat

Bitchat is a decentralized open-source Bluetooth chat application led by Twitter co-founder Jack Dorsey, designed to create an offline communication tool that does not require the internet or centralized servers. It enables encrypted message transmission through a Bluetooth mesh network, making it suitable for natural disasters or areas with limited network access. The project adheres … Read more

Symmetric Key Encryption Algorithms

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Symmetric Key Encryption Algorithms

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

Detailed Explanation of the SM2 Encryption Algorithm

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Detailed Explanation of the SM2 Encryption Algorithm

Security Background In the digital age, we deal with various “secrets”: our bank passwords, payment information, private chats… How can we ensure that this information is not intercepted or tampered with during network transmission? This relies heavily on powerful encryption algorithms. Today, we will delve into our country’s independent cryptographic standard —SM2 encryption algorithm. As … Read more

Empowering the Future of Health with Xinsiyuan’s Ultra-Low Power BLE MCU Based on RISC-V Architecture

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Empowering the Future of Health with Xinsiyuan's Ultra-Low Power BLE MCU Based on RISC-V Architecture

From July 16 to 19, the fifth RISC-V China Summit was grandly held in Shanghai. The event featured a main forum, sub-forums, workshops, and an exhibition area, attracting representatives from hundreds of companies, research institutions, and open-source communities worldwide to discuss the latest developments in the RISC-V ecosystem and the future of the industry. Xinsiyuan … Read more

Why Is a Car Key Circuit Board So Small Yet So Expensive?

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Why Is a Car Key Circuit Board So Small Yet So Expensive?

When you open a car key and see the small circuit board inside, many people often react with: “Is this it? Just a few resistors and capacitors, and a microcontroller chip, how much could it cost? Why is it so expensive?” Today, I will break this down for you and discuss this topic. 1. Security … Read more