Information security With resolved Exercises - Softcover

Lejdel, Brahim

Softcover

ISBN 10: 6209522076 ISBN 13: 9786209522079

Publisher: LAP Lambert Academic Publishing, 2026

Synopsis

This book presents a foundational exploration of information security through the lens of cryptography, moving from classical to modern systems. It begins by illustrating symmetric key encryption with the Hill cipher, which transforms data using linear algebra, and introduces the concept of perfect secrecy with the one-time pad, while noting its practical limitations in key management. The core of the text then delves into public-key cryptography, exemplified by RSA, which solves the key distribution problem through mathematically linked public and private keys. Throughout the examples, the book emphasizes critical practical lessons: the necessity of using sufficiently large keys, the importance of proper encoding and padding, and the fact that security relies not only on strong algorithms but also on robust implementation and key protection. Ultimately, it frames information security as a dynamic, layered discipline that requires constant adaptation to balance confidentiality, integrity, and availability against evolving threats.

Edition details

• Publisher: LAP Lambert Academic Publishing
• Publication date: 2026
• Language: English
• ISBN 10: 6209522076
• ISBN 13: 9786209522079
• Binding: Paperback
• Number of pages: 52