Chaos and Cryptography: Block Encryption Ciphers Based on Chaotic Maps

This paper is devoted to the analysis of the impact of chaos-based techniques on block encryption ciphers. We present several chaos based ciphers. Using the well-known principles in the cryptanalysis we show that these ciphers do not behave worse than the standard ones, opening in this way a novel approach to the design of block encryption ciphers.

Protecting Servers from Digital Attacks using IDPS

Enterprise network servers and websites are exposed to a lot of attacks and attempts to hack, with the aim of sabotage or access to information. IDPS detection and prevention systems play an important role in the process of detecting and preventing hackers, and it's importance increases with the increasing experience and development of attacks and attackers. In this research, we will work to present the attacks that the network can be exposed to, then clarify the concept of cyber security, clarify the types of detection and prevention systems, mechanism and classification. in the practical part, we will apply Snort tool in the process of protecting web servers from denial of service attacks DOS.