Cryptographic Systems and Network Defence Crash Course

About the Book

This book offers a comprehensive introduction to cryptography and cybersecurity, presenting both foundational principles and modern advancements in digital security. It begins by examining computer attacks, security threats, and essential concepts such as confidentiality, integrity, and availability. The text thoroughly explains core cryptographic techniques, including symmetric and asymmetric encryption, digital signatures, and secure key management. It explores widely used algorithms such as Data Encryption Standard (DES) and RSA, highlighting their design and practical applications. This book also discusses message authentication mechanisms and hash functions, including HMAC, to ensure data integrity and authenticity. Network security topics such as SSL/TLS, IPSec, and Public Key Infrastructure are explained with real-world relevance. Practical applications in web security, digital certificates, and secure transactions are presented to connect theory with implementation. Emerging trends such as quantum cryptography, post-quantum cryptography, blockchain security, and privacy-preserving computation are also explored. Each chapter integrates theoretical understanding with practical insights and case studies. Overall, the book equips readers with the knowledge and skills needed to analyze threats and implement effective cryptographic solutions in modern digital systems.

About the Author

Debrupa Palit (Pal) is an accomplished academician, currently serving as an Assistant Professor in the Department of Computer Application at Narula Institute of Technology, a prestigious institution accredited with NAAC ‘A’ grade and ranked by NIRF. She is presently pursuing her Ph.D. in the Department of Electronics and Communication Engineering at NIT Durgapur, West Bengal. Her research interests span diverse areas, including protein sequence comparison and the application of Machine Learning in Biomedicine. She is the author of four books, also has numerous indexed research publications and holds several Indian patents. Her academic journey reflects a strong commitment to excellence in both teaching and research. At Narula Institute of Technology, she has been dedicated to nurturing future IT professionals while actively contributing to academic and scientific advancement. Alongside her doctoral studies, she continues to engage in meaningful research, striving to expand knowledge and contribute significantly to her field.