Variety is the spice of life. Change is the spice of life. 1. Introduction to HTTP and HTTPS HTTPS = HTTP + SSL Similarities In most cases, HTTP and HTTPS are the same because they both use the same underlying protocol. As an HTTP or HTTPS client—browser—establishes a connection to the web server on a … Read more
Hi, Excel enthusiasts! Today I want to share with you a super cool advanced application of Excel—data encryption. That’s right, today we are going to implement the RSA encryption algorithm and digital signatures in Excel! Sounds impressive, right? Don’t worry, I will explain each step in an easy-to-understand way. Through this article, you will learn … Read more
Author丨labuladong Source丨labuladong The “password” mentioned here is not the same concept as the passwords we use in daily life. The cryptographic algorithms discussed in this article mainly address the issues of encryption and decryption in information transmission.We must assume that the data transmission process is insecure, and all information is being eavesdropped on, so the … Read more
Author / Tao Jianfeng, Director of Information Technology Department, CITIC Construction Investment Securities Co., Ltd. Du Guowei, Chen Hongping, CITIC Construction Investment Securities Co., Ltd. Information Technology Department Since the implementation of the “Cryptography Law of the People’s Republic of China”, it has effectively promoted the advancement of cryptographic technology, industry development, and standardized applications. … Read more
Source: ZTE Documentation Original Author: ZTE Documentation Have you heard of IPv5? It was once a highly anticipated technology! IPv5, also known as the Internet Stream Protocol (ST), was designed for connection-oriented communication across IP networks, aiming to support voice and video. However, its 32-bit address scheme is the same as that used by IPv4, … Read more
Click on the image to enlarge 1. Introduction to Multimeter 1.1 Definition A multimeter is a magnetic electrical instrument equipped with a rectifier that can measure various electrical parameters such as AC and DC current, voltage, and resistance. For each electrical quantity, there are generally several ranges. Also known as a multi-purpose meter or simply … Read more
An oscilloscope is a window to observe waveforms, allowing designers or maintenance personnel to see electronic waveforms in detail, achieving a real-time visual effect. Because the human eye is the most sensitive visual organ, it can perceive minute details and quickly reflect objects to the brain for comparison and judgment. According to the different classifications … Read more
This article is authored by Jiu Xin, originally published at: Jiu Xin Says. Introduction Recently, I helped the testing team with some signature-related requirements, and today I would like to briefly discuss the topic of signatures with everyone. If you ask why Android needs signatures, everyone might think of the official explanation: ❝ The Android … Read more
The COVID-19 pandemic has made remote working the new norm and brought the business world into a phase that is yet to be explored. Undoubtedly, due to the lack of face-to-face interaction and standard distance restrictions, many users have had to digitally sign some official documents over the past few years. To maintain the authenticity … Read more
This article provides a preliminary understanding of the field of information security. 1. Briefly describe security attacks, security mechanisms, and security services. Security attack: Any act that jeopardizes the security of an information system. Security mechanism: A process used to detect, prevent attacks, or recover from an attack state to a normal state. Security service … Read more