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Cisy 431:Information Systems Security Question Paper

Cisy 431:Information Systems Security

Course:Computer Science

Institution: Kenya Methodist University question papers

Exam Year:2013

KENYA METHODIST UNIVERSITY

END OF 3''RD ''TRIMESTER 2013 (SB) EXAMINATION
FACULTY : COMPUTING & INFORMATICS
DEPARTMENT : COMPUTER SCIENCE AND BUSINESS INFORMATION
UNIT CODE : CISY 431
UNIT TITLE : INFORMATION SYSTEMS SECURITY
TIME : 2 HOURS

Instructions: Answer question one and other two question

Question One

Differentiate the following terms as used in information security. (10mks)
Stream ciphers and block ciphers
Self-synchronizing ciphers and synchronous ciphers
Passive attacks and active attacks
Symmetric cryptography and asymmetric cryptography
Encryption and decryption

State four ways of preventing virus setbacks.

(4mks)

Define the following terms.

(6mks)

Fire wipes
Cryptography
Cryptanalysis

State and briefly explain the five security mechanisms.

(10mks)

Question Two

Describe the Kerberos architecture.

(12mks)

State the information contained in a public key certificate. (8mks)

Question Three

State and briefly explain the four modes of block ciphers. (8mks)

Explain the following cryptography algorithms.

(12mks)

DES
RSA
Diffie-Hellman

Question Four

State and briefly explain the five services contained in PGP. (10mks)

State and briefly explain any five malicious software.

(10mks)

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