JNTUK B.Tech R19 2020 Model Question Papers || JNTU kakinada (All Branches)
I M.Tech I Semester(R19) Regular Examinations
APPLIED CRYPTOGRAPHY
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COMPUTER SCIENCE AND ENGINEERING
MODEL QUESTION PAPER
TIME: 3Hrs Max.Marks: 75SM
Answer ONE Question from EACH UNIT
All questions carry equal marks
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| CO | KL | M | |||
|---|---|---|---|---|---|
| UNIT-1 | |||||
| 1. | a.) | Explain Advanced Protocols | 1 | 1 | 7 |
| b.) | Write about blind signatures and public key cryptography | 1 | 1 | 8 | |
| OR | |||||
| 2. | a.) | Classify the block cipher modes of operation | 1 | 1 | 8 |
| b.) | Explain block cipher design principles in detail | 1 | 1 | 7 | |
| UNIT-2 | |||||
| 3. | a.) | State and prove Euler’s Theorem and Determine ¢(37)and ¢(35) | 3 | 2 | 8 |
| b.) | Define a Primitive root. Find all primitive roots of 25 | 3 | 3 | 7 | |
| OR | |||||
| 4. | a.) | Summarize DES encryption algorithm | 3 | 2 | 8 |
| b.) | Explain CAST-128 cipher | 3 | 2 | 7 | |
| UNIT-3 | |||||
| 5. | a.) | Differentiate Sequence generators and Linear Congruential generators | 2 | 1 | 7 |
| b.) | Explain stream ciphers using LFSR,RC4 | 2 | 1 | 8 | |
| OR | |||||
| 6. | a.) | Compare the principle characteristics of MD5,SHA-1 | 4 | 2 | 7 |
| b.) | Analyze message authentication using MAC | 4 | 2 | 8 | |
| UNIT-4 | |||||
| 7. | a.) | Perform encryption and decryption using RSA algorithm for p=5,q=11,e=3 and M=9 | 2 | 3 | 7 |
| b.) | Write about Digital Signature Algorithm | 4 | 2 | 8 | |
| OR | |||||
| 8. | a.) | Explain Elliptic Curve Encryption and Decryption | 2 | 2 | 7 |
| b.) | Explain RabinmElGamal Algorithm | 2 | 2 | 8 | |
| UNIT-5 | |||||
| 9. | a.) | Apply Diffie-Hellman algorithm to exchange keys securely | 5 | 2 | 7 |
| b.) | With the help of neat diagram ,explain Kerberos action | 5 | 2 | 8 | |
| OR | |||||
| 10. | a.) | Write about the PGP services a)Authentication b)Confidentiality | 5 | 1 | 8 |
| b.) | Explain public key cryptography standards | 2 | 1 | 7 | |
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