Buy the instructor's resource material. McGraw-Hill provides a password-protected to verified faculty. This is the official source of Atul Kahate PPTs. These slides are high-quality but are often text-heavy, requiring you to strip down bullets.
Use this for the opening slide of a presentation. cryptography and network security atul kahate ppt
Proving identity and non-repudiation.
Based on the difficulty of factoring large prime numbers. Buy the instructor's resource material
: Hiding the existence of a message within another medium (like an image). Security Goals in Cryptography and CNS | PDF - Scribd cryptography and network security atul kahate ppt