CRYPTOGRAPHY IMPORTANT QUESTIONS

This is last year sem CRYPTOGRAPHY paper....

1) NETWORK SECURITY MODEL AND VARIOUS SECURITY ATTACKS
2)EUCLEADIAN ALGORITHM FOR A GIVEN POLYNOMIAL
3)FERMATS THEOREM.FIND 14^27 MOD 55
4) DES ENCRYPTION WITH SINGLE ROUND OF DES ALGORITHM
5) BLOCK CHIPPER MODES OF OPERATION AND EFFECTS OF CRYPTOGRAPHY ALGORITHM
6) DIFFIE HELLMAN KEY EXCHANGE ALGORITHM+ PROBLEM
7) EXPLAIN ELLIPTIC CURVE ARITHMETIC AND HOW IT IS APPLIED IN CRYPTOGRAPHY
8) SHA
9) ElGamal AND SCHNORR DIGITAL SIGNATURE SCHEMES AND COMPARE THEM