In Linux system administration, the Principle of Least Privilege (PoLP) is one of the core principles of secure operations. Directly using the <span>root</span> user for operations carries high risks; it is recommended to create an administrator user with <span>sudo</span> privileges (such as <span>admin</span>) to reduce the impact of accidental operations and security threats. This article … Read more
🌟 The ‘Non-configurable’ Aspects of Linux: Underlying Constraints and Design Choices 💡 Introduction: The Linux system is renowned for its high degree of customizability, with nearly all configurations achievable through modifying configuration files, recompiling the kernel, or writing scripts. However, within this open and free system, there still exist some ‘non-configurable’ or ‘hard-to-configure’ components. Today, … Read more
March is a time of blooming flowers. Following the spring light, Xiao E arrived at the Yuquan Campus of Zhejiang University.Did you know? In the Department of Electrical Engineering at Zhejiang University,there is such a tradition: every Monday at noon, professors from the electrical discipline gather for lunch to discuss recent key work in a … Read more
Follow+Star Public Account Number, don’t miss out on exciting content Author | strongerHuang WeChat Public Account | strongerHuang First, let’s clarify what MPU means. MPU has many meanings, the most common ones are: MPU: Memory Protection Unit, which is the focus of this article; MPU: Microprocessor Unit; Additionally, some may associate it with modules like … Read more
01 Introduction Ubus is the inter-process communication mechanism in OpenWRT, which simplifies the implementation of inter-process communication. The foundation of ubus is the UNIX Socket, which is a local socket that is more efficient and reliable compared to traditional network communication sockets. 1.1 Model Architecture UNIX Socket adopts a C/S model architecture, divided into server … Read more
Follow ★ our official account to get information first-hand. In modern society, embedded devices are ubiquitous, from smart homes in our daily lives to various industries such as industrial control and medical devices, the applications of embedded devices are endless. So, what are the differences between functional safety and information security in embedded devices, and … Read more
This article focuses on the wake-up, sleep, and reset of the ECU, examining whether your understanding aligns with these concepts. 1. ECU Wake-up To clarify the ECU wake-up process, we must study the corresponding hardware schematic. The essence of ECU wake-up is to supply power to the ECU. For better understanding, this article simplifies a … Read more
1. Characteristics of Automotive Electronic Control Unit Repair The automotive electronic control unit (ECU) is the core component of various automotive electronic control systems. When faults occur in these systems, many issues may be related to the ECU. However, compared to other components and circuits in the automotive electronic control system, the failure probability of … Read more
Five years ago, a new adjustable ECU/ECM claimed to be “unhackable” and dominated the market at that time; it was the GM E41 ECM Services (L5P). This ECU/ECM first appeared on the L5 Peter Max truck in 2017, and many believed that such ECUs/ECMs could not be hacked or tuned. As experts from the external … Read more
2016 was a fruitful year for China’s industrial control system information security market, especially with significant breakthroughs in relevant laws, regulations, and standards. The Industrial Control System Information Security Industry Alliance (ICSISIA) has specially compiled and published the top ten news events in China’s industrial control system information security for 2016. Let’s take a closer … Read more