1. What is it Symmetric encryption refers to the use of the same key for both encryption and decryption. The process of encryption and decryption is illustrated in the following diagram: Symmetric encryption algorithms have the advantages of fast speed and high efficiency, but they face challenges in key distribution and are susceptible to eavesdropping. … Read more
Symmetric encryption can be divided into block ciphers and stream ciphers. Block ciphers typically use a fixed size as the basic unit for processing, while stream ciphers use a single unit element (a letter or a bit) as the basic processing unit. Of course, when the block length is equal to the unit length, a … Read more
This article continues to focus on the protocol layer, with three articles planned for this layer. The next one will cover DNP3, which is widely used in power systems. Most of the referenced materials in this article are accessible, except for one write-up on reversemode.com (http://reversemode.com/downloads/logix_report_basecamp.pdf) that requires authentication to download. If anyone can download … Read more
This series is divided into two parts, primarily introducing knowledge related to symmetric encryption, including the concept of symmetric encryption, its development history, block cipher algorithm structure, stream cipher algorithm structure, typical symmetric encryption algorithms, and the applications of symmetric encryption algorithms. 1.Concept of Symmetric Encryption Algorithms Both parties in communication can use a secure … 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
Content Introduction Abstract The CAESAR competition is an authenticated encryption algorithm competition funded by the National Institute of Standards and Technology (NIST) in 2013, aimed at soliciting authenticated encryption algorithms that outperform AES-GCM in both comprehensive performance and security, capable of providing both integrity and confidentiality. The final selected algorithms may be recommended to the … Read more
1 Introduction DES algorithm is a common block cipher algorithm proposed by IBM in 1971. The DES algorithm is a typical representative of block ciphers and is also the most widely used symmetric encryption algorithm. This article will detail the principles and implementation process of DES. 1.1 Plaintext Plaintext refers to data that has not … Read more