Download JNTUH MCA 4th Sem R15 2020 November 824AE Information Security Question Paper

Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 4th Sem (Fourth Semester) Regulation-R15 2020 November 824AE Information Security Previous Question Paper

S OCT 2020

R15

Code No: 824AE















JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA IV Semester Examinations, October/ November - 2020

INFORMATION SECURITY

Time: 2 Hours











Max.Marks:75



Answer any five questions

All questions carry equal marks

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1.

Define Caesar cipher? Calculate the encryption and decryption for the following



plain text P= "COME TO MY HOME" by using ceaser cipher with Key k=3.

[15]


2.a)

Specify and contrast all kinds of cipher techniques in the cryptography.

b)

Mention the key principles of security.











[7+8]


3.a)

Differentiate between AES and DES in a brief manner.

b)

Explain how key is generated in the RSA algorithm.







[7+8]



used

4.a)

Differentiate block cipher and stream cipher techniques.

b)

Explain key distribution of symmetric key.









[7+8]


5.a)

Define authentication service. And explain x.509 authentication services in a detail.

b)

Describe why Kerberos is more secure than the other security mechanisms?

[7+8]


6. Describe the following terms in detail
a) Whirlpool b) knapsack algorithm.









[7+8]


7.a)

Demonstrate combining security associations.

b)

Discuss about the IP security architecture in detail.







[7+8]


8.a)

Differentiate socket layer security and transport security.

b)

Demonstrate techniques used to avoid guessable password.





[7+8]



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