1. List and briefly explain about various security attacks.
2. What are the challenges of network and computer security?
3. What is the difference between symmetric encryption and asymmetric encryption?
4. Give some attacks and its corresponding countermeasures in cryptography.
5. List and briefly explain about different categories of the security services.
1. Find the value of x2 and y2 from the given values (a, b) = (16, 10374) by using extended Euclidean algorithm.
2. Find the x value for the equation x2 ≡ 1 (mod 35) using CRT.
3. Find the x value for the system of congruences.
x ≡34 mod
x ≡25 mod
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