Introduction: This article is the course notes from the afternoon session of the Fully Homomorphic Encryption summer class. The afternoon course was taught by Professor Xie Xiang, titled “Theory and Construction of Fully Homomorphic Encryption.” Professor Xie is a researcher at Shanghai Qi-Zhi Institute, primarily engaged in the research and implementation of efficient and secure … Read more
This article is an excerpt from a book produced by Zhihu: “Cats, Einstein, and Cryptography: Quantum Communication That I Can Understand” From Julius Caesar to Sherlock Holmes from Nazi leader Hitler to the father of AI, Turing… How did the ultimate code in the field of communication come into being? All of this must start … Read more
A few days ago, the news of Google cracking the SHA-1 algorithm flooded my social media feed. In fact, the term “crack” is not entirely accurate, it should be that they published an example of breaking the SHA-1 algorithm. Regarding this news, I saw two different comments: A: Wow, that’s amazing! They actually cracked an … Read more
Reliable and Efficient: The Block Cipher Written by | Teacher Kang In the previous five issues, we discussed the intrinsic characteristics and structures of cryptography, as well as the relationship between cryptography and security. Starting from this issue, we enter the second part of this series – the
Commercial cryptographic technology refers to the technology that can implement encryption, decryption, and authentication functions of commercial cryptographic algorithms (including programming technology for cryptographic algorithms and implementation technologies for cryptographic algorithm chips, encryption cards, etc.). Commercial cryptographic technology is the core of commercial cryptography, and the state has classified commercial cryptographic technology as a national … Read more
1. Operations In simple terms, a group ring field is a collection with operations. Let’s first look at some content related to operations. An operation is actually a mapping from one set to another: We call an operation involving n operands an n-ary (target) operation; specifically, if n=2, it is called a binary operation. At … Read more
Research and Realization of the RSA Encryption Algorithm Improvement YU Xin–hong,CHEN Qi,YAN Yu (Economy and Technology Institute, Anhui Agricultural University, Hefei, Anhui 230011, China) Abstract：The modular exponentiation and modular multiplication are essential elements to secure RSA algorithm. However, modular exponentiation has been so time-intensive that it impedes RSA algorithm’s application. Therefore, it is paramount to … Read more
If you ask me, which algorithm is the most important? I might answer “Public Key Encryption Algorithm“. Because it is the cornerstone of computer communication security, ensuring that encrypted data cannot be cracked. You can imagine the consequences if credit card transactions are compromised. Before getting into the main topic, let me briefly introduce what … 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
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