Q1.You have just been hired as the new Network level guy. The boss called you up on day 1 and said; send this package to Mr. XYZ. Make sure that NO one removes anything from this package or add to it. What are you going to do? You are completely new to this level security. Oh and by the way, the boss said, remember that when you are delivering this package, the guard at the gate of the office definitely wants to know about the label of the contents of the package and may want to modify it.

B) What are the functions to produce Authenticator? Describe in details.

Q2: Does the credit card number 4131 1131 1211 1511 satisfies the MOD 10 check? Explain the process.

B) It is the good idea to obscure relationship between your real message and encrypted message. Kindly transform the plain text i.e. DETECT THE XYZ using transposition and confusion methods. Explain your answers