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(a) (i) If m = p·q·r where p, q, and r are prime numbers, what is Φ(m)?
(ii) Therefore, Determine Φ(440).
(b) Describe the following terms as used in cryptography:
(i) Avalanche effect (ii) Stream cipher (iii) Primitive root (iv) Confusion (v) Steganography ((c)
Suppose an elliptic curve encryption/decryption scheme. The cryptosystem parameters are E5(1,6) and G=(2,4). B's secret key is nB=2.
(i) Find B's public key PB.
(ii) A wishes to encrypt the message Pm=(0,2) and selects the random value k=2. Determine the ciphertext Cm.
Discuss the risks of having a single root user
Question 1: (a) Differentiate between symmetric and asymmetric encryption system. (b) Describe how a digital signature is created. (c) Explain briefly what SSL (secure so
Question: (a) Besides privacy, what other security functions does Pretty Good Privacy (PGP) provides? (b) What is the Post Office Protocol (POP) used for? Why is it impo
The objective of this example is to demonstrate the steps required for a successful attack against a vulnerable Windows XP SP2 system. It will show: a) how Nessus can be used to di
You are designing a Demilitarized zone for a large corporation. Using design best practice, and the information that you have learned so far, propose a design that will provide the
Ask question #Minimum 100 words are there non parasitic viruses
explaain it?
LOCAL TALK Apple discovered the LAN technology that uses bus topology. Its interface is added with all Macintosh computers. It has very low speed i.e. 230.4Kbps. Also it is ch
on LAN,where are IP datagrams transported?
SECURITY ANALYSIS Overview • Know yourself: examine, identify, and understand the information and systems which are currently in place • Know the enemy: examine, identify,
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