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Question:
a) Differentiate between ‘Gross Settlement' and ‘Multilateral Net Settlement' providing suitable examples where necessary to support your answer.
b) Differentiate between the symmetric and the asymmetric encryption system providing illustrations where necessary to support your answer.
c) The following technologies can be applied to an e-banking infrastructure to ensure security. Briefly explain the role of each one of them.
(i) SSL (Secure Socket Layer) (ii) Digital Certificate
d) Explain the concept behind digital signature and how it can be used to ensure both authenticity and confidentiality. (Provide suitable illustration to support answer).
(a) Explain the importance of the Euler Totient function in Cryptography. Calculate Euler Totient function value, φ(1280). (b) Explain the role of the Authentication Server (
Elements of Cryptosystems Cryptosystems is characteristically made up of algorithms, data handling techniques, and procedures which are combined in multiple ways to ensure confi
- Alice, Bob and Charlie have a secret key a=3, b=4, c=5, in that order. - They would like to find a common secret key using Diffie-Hellan key exchange protocol (with g=2, p=5).
Is standard TCP effective in mobile wireless networks that operate with the IEEE 802.11 wireless local area network protocol?Discuss the issue
Question 1 a) Explain how CSMA/CD works. b) Describe the term "exponential back-off". c) Describe the differences between "circuit switching" and "packet switching". d) Th
Question An organization is planning to connect its networks to the Internet. The network is located within a four story building. A web server supporting online sales is also
Firewalls A firewall in an information security program that prevents specific types of information from moving between the outside world and the inside world. The firewall may
(a) Describe how CSMA/CD operates and explain how Ethernet deals with collisions. (b) Describe how the subsequent protocols work: i. ARP ii. DHCP iii. DNS iv. SMTP (c) The
Base lining • Organizations do not have any contact to each other • No two organizations are identical to each other • The best practices are a moving target • K
(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)
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