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Security Primitives
a) Explain the different roles between hashing and message authentication codes (MAC). Can a good hash function serve as a good MAC, and vice versa?
b) What is the relationship between hashing and digital signatures? Which fields of an X.509 certificate are related to hashing and/or digital signatures?
c) Explain how hashing, MACs and digital signatures are used in SSL. Explain how the cipher_suites parameters are used to specify or change a given collection of algorithms for hashing, MACs and digital signatures.
Keeping the IV secret in OFB mode does not make an exhaustive key search more complex. Describe how we can perform a brute-force attack with unknown IV. What are the requirements regarding plaintext and ciphertext?
Each of network segments has at least one NetWare server on it. Which of the given replies to Get Nearest Server (GNS) request from client?
Can they use virtual private network and tunneling protocol, or is a better technique available? Justify your answer.
two hosts, A and B, are separated by 20,000 kilometers and are connected by a link of R=2 Mbps, and there are 4 routers between A and B. Suppose the propagation speed over the link is 2.5*108 meters/sec, average queueing time is 2ms,
If both C1 and C2 at time t0 have congestion window of 10 segments, determine their congestion window sizes after 2200 msec?
What are the areas addressed in CBK? Was policy explicitly listed? If not, where do you feel it is addressed in the CBK?
What is the relationship between individual characteristics and job satisfaction?
Be the sum of the first n cubes. Prove the following equalities by induction on n, to arrive at the curious conclusion
Should Iris have placed CD back at coffee station and forgotten entire thing? Describe why that action would have been ethical or unethical.
Show the result of inserting these keys using linear probing, using quadratic probing with c1 = 1and c2 = 3, and by using double hashing with h2(k) = 1 + (k mod (m-1)).
Is there a need for a network to be built for connecting the servers and users, will data go across the WAN or will it stay local to the LAN?
question 1a what are the indispensable ingredients of a symmetric cipher?b what are the two basic meanings used in
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