الفصل الأول امنية الحاسوب

This section will introduce the most important terms of modern cryptology and will teach an important lesson about proprietary vs. openly known algorithms. We will also introduce modular arithmetic which is also of major importance in public-key cryptography.
In this chapter you will learn:

• The general rules of cryptography
• Key lengths for short-, medium- and long-term security
• The difference between different types of attacks against ciphers
• A few historical ciphers, and on the way we will learn about modular arithmetic, which is of major importance for modern cryptography as well
• Why one should only use well-established encryption algorithms

Reference: Understanding Cryptography A Textbook for Students and Practitioners, by Christof Paar and Jan Pelzl