Alan Turing was primarily responsible for breaking the German Enigma cipher system during World War II. Decrypting codes required extensive computation, and Turing understood that to do a good job, one must first sharpen their tools. Thus, a computer called COLOSSUS was developed in 1943, and a total of 10 such electronic computers were produced, … Read more
Many friends have asked me about what happened yesterday at our company, and I was also very shocked by the incident. Before the truth is clarified, I hope everyone can view the situation rationally. Of course, if the truth indeed reveals what has been said, it must not be tolerated. Java‘s encryption knowledge is also … Read more
Source丨Authorized Reprint from Sanfen E (ID: Fighter3FullStack) Author丨Sanfen E Introduction In our daily work, we often use encryption and decryption in various scenarios, such as: User passwords should not be stored in plaintext; they must be stored as encrypted ciphertext. Sensitive data like bank card numbers and ID numbers need to be transmitted securely. For … Read more
Today, we will introduce commonly used encryption algorithms, their classifications, and applications. 1. Symmetric Encryption Algorithms Symmetric means that both parties using this encryption method use the same key for encryption and decryption. The key is the instruction that controls the encryption and decryption process. The algorithm is a set of rules that specifies how … Read more
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Background Alibaba Cloud Log Service serves as a cloud-native observability and analysis platform. It provides a one-stop solution for data collection, processing, querying, visualization, alerting, consumption, and delivery, significantly enhancing users’ digital capabilities in development, operations, operations, and security scenarios. The log service platform, as an observability platform, offers functions such as data import, data … Read more
Table of Contents 1.1 Starting with Hello World 1.2 The Essence Remains Unchanged 1.3 The Higher You Stand, The Further You See 1.4 What the Operating System Does 1.4.1 Don’t Let the CPU Doze Off 1.5 What to Do When Memory is Insufficient 1.5.1 About Isolation 1.5.2 Segmentation 1.5.3 Paging 1.6 Many Hands Make Light … Read more
Computer memory, is the temporary storage area of a computer, which holds the data and instructions needed by the Central Processing Unit (CPU). The instructions, which refer to specific operations of the processor, are defined by the Instruction Set Architecture, which typically includes four types of instructions: arithmetic, logic, data movement, and control flow. Before … Read more
1. Introduction to QuarkTS GitHub link: https://github.com/kmilo17pet/QuarkTS Open Source License: MIT license QuarkTS is an open-source embedded operating system designed to provide a modern development environment for small embedded applications, helping developers build stable and predictable event-driven multitasking software. Its features include: • Priority Cooperative Scheduling: Tasks manage their own lifecycle, avoiding the complexities brought … Read more
1. Introduction The core objective of real-time systems is to ensure that tasks are completed at the correct times and within specified time limits. In the design of real-time systems, not only is functional correctness required, but when to start and when to finish are also important considerations. To achieve this goal, compared to general … Read more