ICT211 Jul 2010 TMA01 - ICT211 ENCRYPTION TECHNIQUES AND...

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ICT211 ENCRYPTION TECHNIQUES AND SYSTEM SECURITY Tutor-Marked Assignment Jul 2010 Presentation
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ICT211 Tutor-Marked Assignment SIM UNIVERSITY Tutor-Marked Assignment – Page 2 of 3 TUTOR-MARKED ASSIGNMENT This tutor-marked assignment is worth 21% of the final mark for ICT211: Encryption Techniques and System Security The cut-off date for this assignment is 31 August 2010. _________________________________________________________________________________ Question 1 (20 marks) (a) List and brief define the categories of security services defined by X.800. (15 marks) (b) For each of the category stated in part (a), provide an example of its specific services. (5 marks) Question 2 (20 marks) (a) In an encryption scheme, how would one consider it as computationally secure? (4 marks) (b) What is cryptanalysis and describe the various types of cryptanalytic attacks? (16 marks) Question 3 (20 marks) Consider the following message packet; Actual Data Timestamp Sequence Number (a) Suppose there is a secret key algorithm and Alice and Bob share a secret key for this
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ICT211 Jul 2010 TMA01 - ICT211 ENCRYPTION TECHNIQUES AND...

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