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(a) Describe RSA encryption.
(b) For an RSA encryption the values of the primes are: p=29, q=31. select e=11, evaluate the public and private keys.
(c) How can RSA be used for preparing a digital signature.
(d) Describe why in using the RSA encryption to prepare a signature it is normal to sign a message digest of the message and not the message itself. In respect of this application of message digests, state the properties of a good message digest function.
(e) Describe three possible attacks on RSA and explain how RSA responds to each of these attacks.
Question: (a) A string of ciphertext was enciphered using an a±ne transformation of single letters in a 28-letter alphabet consisting of A to Z, a blank and a?, where A to Z ha
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How to pretect my computer from attacking
'Near Field Communication' (NFC) technologies are expected to become commonplace in the near future. Some relevant features are these: A suitable device (such as a mobile pho
Question (a) Estimate the average throughput between two hosts given that the RTT for a 100 bytes ICMP request-reply is 1 millisecond and that for a 1500 bytes is 2 millisecon
Repeater known as regenerator ; it is an electronic machine that performs only at physical layer. It gets the signal in the network before it becomes loss or weak, recreates the
(a) Describe the concept of zero knowledge proofs. Give a practical example. (b) Explain how a one way hash function works. (c) What are message authentication codes? (d)
Describe the process a proposed standard goes through to become an RFC
(a) Consider the subsequent authentication options: A. Using password. B. Using pin and fingerprint Which option A or B provides stronger security and why? (b) Give
Problem (a) Differentiate between private key and public key encryption. (b) What issue with private key encryption is resolved with public key encryption? (c) Describe
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