Department of Computer Science & Software Engineering - Engineering Assignment Help

Assignment Task

Task
Consider a student information system (SIS) in which students provide a university student number (USN) and a card for account access. Give examples of confidentiality, integrity, and availability requirements associated with the system and, in each case, indicate the degree of the importance of the requirement
ANSWER No 1:
Confidentiality: Confidentiality rate is high as the authorized student must access to account through the card because there is personal information has store and that card only available to the authorized student.
Integrity: University must ensure their integrity is maintained and student information is secure. Card number is only use by the authenticate student. Integrity rate is high for Card number.
Availability: Card number is only available to authenticate student to access personal information. Card number have higher rate in Availability here.
Question No.2

Kerberos is one of the protocol used for authentication purpose. Discuss at least two other protocols that are used for authentication purpose
Question No.3

Encrypt the message
‘Be at the third pillar from the left outside the lyceum theatre tonight at seven’
Using a columnar cipher with 4 rows and 4 columns, and the permutation (1, 2, 3, 4) ? (3, 1, 2, 4)
In Man in the Middle attacks communications are intercepted and altered before they are sent on to the recipient. Identify and discuss that attack?
Question No.4
a. Consider the following groups for system’s access control lists:

Group1: Jack, Mary, Jane, Dave
Group2: Ana, Bob, Tim
Suppose the access control list for File 1 is:
– File 1: Group 1, RW; Group 2, R
State whether Mary will be allowed to write to File 1. Give reason
State whether Tim will be allowed to write to File 1. Give reason
b. Contrast the following alternatives to access control and indicate scenarios where one methodology might be more advantageous than the others:
i) Mandatory access control (MAC)
ii) Discretionary access control (DAC)
iii) Role-based access control (RBAC)
Question No.5

What are some of the most common attacks used to gain access to a user's password? For each attack listed, give at least one way we can defend against it.
Why it is good to hash passwords that are stored in a file?
Question No.6
The IS auditor is reviewing prior findings from an IS audit of a hospital. One finding indicates that the organization was using email to communicate sensitive patient issues. The IT manager indicates that to address this finding, the organization has implemented digital signatures for all email users. Discuss how digital signature work?

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