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
Recently, I’ve been discussing addition and subtraction with regrouping within 20 in our activity group. We have progressed from understanding numbers within 100, practicing making ten, basic methods of regrouping, to the second round of learning numbers within 10, and now we’ve reached more strategies for calculations within 20. In the past couple of days, … Read more
The Tor browser, known for its anonymity, is striving to reach new heights in the pursuit of encryption keys. To generate encryption keys that are hard to crack, it is necessary to innovate and upgrade the random algorithms. A key is a parameter that is input data in the algorithm that converts plaintext to ciphertext … Read more
National encryption refers to the domestic encryption algorithms recognized by the National Cryptography Administration. The main algorithms include SM1, SM2, SM3, SM4, and the latest SM9. These algorithms are primarily used in domestic environments as recognized by the National Cryptography Administration. SM2 Algorithm: The SM2 elliptic curve public key cryptography algorithm is a public key … Read more
In May 2017, the WannaCry ransomware virus broke out globally, with some university students in mainland China reporting that their computers were attacked by the virus and documents were maliciously encrypted. The ransomware wreaked havoc, resembling a global internet disaster, causing significant losses to computer users. According to the latest statistics, over 100 countries and … Read more
Click the blue text Follow us The Birth of Asymmetric Encryption Tree Brother: Cryptography can be simply divided into classical cryptography and modern cryptography. We have already introduced substitution ciphers and the Enigma machine in classical cryptography, and now we will begin to discuss symmetric and asymmetric encryption methods in modern cryptography. I’m sure you … Read more
HTTPS (full name: Hypertext Transfer Protocol Secure, is a secure version of HTTP designed with security in mind. This article will delve into its principles. 1 Why HTTPS is Necessary The reason for using HTTPS is quite simple: it is due to the insecurity of HTTP. When we send sensitive data to a server (such … Read more
1. Definition of Cryptography Before the late 20th century, cryptography was more of an art, primarily used for secret communication. At that time, there were no theories to rely on, nor any effective definitions to construct a good cipher. It wasn’t until the 1980s that the emergence of modern cryptography transformed the study of cryptography … 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
“IT Chat” is a professional information and service platform under the Machinery Industry Press, dedicated to helping readers master more professional and practical knowledge and skills in the broad field of IT, quickly enhancing workplace competitiveness. Click on the blue WeChat name to follow us quickly. Secure Multi-Party Computation Before discussing secure multi-party computation (hereafter … Read more