Answer to Question #278615 in Software Engineering for Prisy

Question

1a. In the context of core Access Control 

Define the following:

i. The notion of User-Role assignment (UA relation) [5 Marks] 

ii. Define Discretionary Access Control (DAC)

b. Briefly describe the processes of encryption and decryption in relation to cryptography. 

c. Explain how public key cryptography may be used for identification.

2. a. Explain how access control lists are used to represent access control matrices. Describe the 

environments in which they are widely used and their advantages and disadvantages.

b. What is the plaintext for the following ciphertext, which was encrypted using a Caesar 

substitution cipher:

i. FRURQD SDQGHPLF DWWDFN 

ii. XQLWHG ZH VWDQG WRJHWLHO 

c. List the names of five security services desired in computer networks. For each service, 

explain what the service means.

Answer 1

Dear Prisy, your question requires a lot of work, which neither of our experts is ready to perform for free. We advise you to convert it to a fully qualified order and we will try to help you. Please click the link below to proceed: Submit order