Cryptography And Network Security Assignment 7 Answers 2022

NPTEL Cryptography And Network Security Assignment 7 Answers 2022:- In this post, We have provided answers of Cryptography And Network Security Assignment 7. We provided answers here only for reference. Plz, do your assignment at your own knowledge.

About Cryptography And Network Security

The aim of this course is to introduce the student to the areas of cryptography and cryptanalysis. This course develops a basic understanding of the algorithms used to protect users online and to understand some of the design choices behind these algorithms. Our aim is to develop a workable knowledge of the mathematics used in cryptology in this course. The course emphasizes giving a basic understanding of previous attacks on cryptosystems with the aim of preventing future attacks. A wide variety of basic cryptographic primitives will be discussed along with recent developments in some advanced topics like identity-based encryption, attribute-based encryption, functional encryption, two-party/multi-party computation, bitcoin and crypto-currency and postquantum cryptography. The cryptanalysis part will help us understand challenges for cybersecurity that includes network security, data security, mobile security, cloud security and endpoint security.

CRITERIA TO GET A CERTIFICATE

Average assignment score = 25% of the average of the best 8 assignments out of the total 12 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Cryptography And Network Security Assignment 7 Answers 2022

1. If r = 4(mod 17), r = 3(mod 11), then r =. (mod 187).

(a) 32
(b) 157
(c) 34
(d) 23

`Answer:- b`

2. Rabin cryptosystem is secure under the hardness of__________.

(a) decoding problem
(b) discrete logarithm problem
(c) factorization
(d) Subset-sum

`Answer:- c`

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3.

`Answer:- c`

4. (11/51) +(7/11) =____________

(a) 1
(b) 0
(c)2
(d)-1

`Answer:- b`

5. All quadratic residues modulo 17 are_________________.

(a) 1,2,4, 8, 9, 13, 14, 16
(b) 1,2,4, 8,9, 11, 15, 16
(c) 1,2,3,8, 9, 13, 15, 16
(d) 1,2,4, 8,9, 13, 15, 16

`Answer:- d`

6. Let p, q are odd positive integers. Then, (p/q)= -(q/p)if

(a) p=q= 3(mod 4)
(b) p=q= 1(mod 4)
(C)p= q= 2(mod 4)
(d) none of these above

`Answer:- a`

👇For Week 08 Assignment Answers👇

7. Using Rabin cryptosystem with n = 161, encrypt message m = 24. The Ciphertext is ____________.

(a) 47
(b) 44
(c) 65
(d) 93

`Answer:- d`

8. Quadratic non-residues modulo 19 are ___________.

(a) 2,3,8, 10, 12, 13, 14, 17, 18
(b) 2,3,8, 11, 12, 13, 14, 15, 18
(c) 2,4,8, 10, 12, 13, 14, 15, 18
(d) 2,3,8, 10, 12, 13, 14, 15, 18

`Answer:- d`

9.

`Answer:- c`

10. Evaluate (4015/331).

(a). 0
(b). 2
(c). -1
(d). 1

`Answer:- d`