B.Tech. III Semester
Examination, June 2023
Grading System (GS)
Max Marks:
70 | Time: 3 Hours
Note:
i) Attempt any five questions.
ii) All questions carry equal marks.
iii) In case of any doubt or dispute the English version question should be treated as final.
a) What is Perfect Secrecy in Crypto System? Explain. (Unit 1)
b) Explain the purpose of One-Time Pad encryption? (Unit 1)
a) How does the DES algorithm work in cryptography? Discuss with suitable example. (Unit 2)
b) What is Message Authentication Code (MAC)? Discuss about secure MAC. (Unit 2)
a) What is Random Oracle Model in cryptography? Explain. (Unit 3)
b) What do you mean by trapdoor attacks? Explain. (Unit 3)
a) Write the importance of Discrete Logarithms in Cryptography? (Unit 4)
b) Explain the following? (Unit 1)
i) Authenticate
ii) Confidentiality
iii) Authorization
a) What is a SSL protocol? How many protocols are there in SSL discuss in detail. (Unit 5)
b) Discuss the role of number theory used in Cryptography? (Unit 5)
a) What is Symmetric vs. Asymmetric Encryption? Discuss. (Unit 1)
b) Explain about AES algorithm with suitable example. (Unit 2)
a) Give an overview of Diffie-Hellman problem? Discuss about the main problem that Diffie-Hellman key exchange faces? (Unit 4)
b) Write about One-way vs Two-way hash functions? (Unit 2)
Explain any two of the following?
a) Transport Layer Security (Unit 5)
b) Interactive protocols in Cryptography (Unit 5)
c) Hybrid Cryptosystem (Unit 5)
d) Hill Cipher (Unit 1)
