ಟ್‌ ‏سه‎

es: 2
010110 072 Pages

Reg 0 Name: ‏يبال سبح‎
न AB UL KAL/ ⋅ 1 പല്ല്‌ OLOGICAL ‏انا‎ 1
AP. 3 5
fth 5 S| 3 ಟಿ! nd Supp ८111९11 tary Ex 11111112
Fi emester MCA Reg! ilar a pie, sx tron December 2020

Course Code; RLMCA305 है
Course Name: CRYPTOGRAPHY AND CYBER SECURITY

0 Duration: 3 Hours
Max. Marks: 6

PARTA १७1७
Answer all questions, each question carries 3 marks,
\ Wustrate symmetric cipher model in Cryptography. (3)
2 Compute the multiplicative inverse of 23 in 7100. (3)
(=

3 Write short note on modern Stream ciphers. (3)
“a Compare and contrast Symmetric and asymmetric key encryption, (3)

5 List out the classification of digital signature schemes, (3)
& Discuss the features of 8110011. ം (3)
7 Illustrate PGP message format in Email securit 1 (3)
8 Explain security services for Email. _ (3)

PART B
Each question Carries 6 marks.
Module 1
9 Explain Security services and mechanisms in cry Plography (6)
OR
2 Explain Steganography method with text Covering Process, (6)
Module 11
1] Explain Euclidean algori fj
‏]لك‎ gorithm and | Ind the Multiplicative ;
1081 i
Using the algorithm, 708/1೮ inverse ‏کے + انی‎ (6)
12 | oR
Give a short 1016 On the following,

i) Fermat's theorem (6)

॥) Euler 5 theorem

iii) Testing for Primatity