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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