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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.
Answer the following in relation to a scenario where Bob and Alice use Kerberos for mutual authentication. When Bob receives a ticket from Alice, how does he know it is genuine?
Define Physical secuirty and three types of threats related with physical security. Write down the steps in designing and choosing a secure site in detail.
Decrypt the cipher-text c = 12 by using secret key sk = (p, q) = (11, 13), where te corresponding public key is pk = (N, e) = (143, 13).
Create a threat model for your own blog set up. Additionally, explain the purpose of building a threat model, and how it applies to this case.
Alice and Bob choose the numbers 6 and 10 privately. What will be the public values they transmit and what would be the final secret computed?
Do some research and report a recent information security incident. How could this incident have been avoided? What management challenges did this incident present?
Suppose that Alice shares secret with her company's server computer. When Alice is on trip, she tries to store important message in CEO's account directory. Is this protocol secure? If not, how do you feel it could be modified to make it so?
You begin the session by sending Bob your calculated value of TA. Bob responds by sending you the value TB = 291. What is the value of your shared secret key?
WAP protocol, cellular network infrastructure, SSL protect against eavesdropping, network datagrams (packets) be protected at the network layer, pin and fingerprint, Certificate Revocation, Public Key Infrastructure, modern symmetric algorithm bl..
Analyse the article/case study from the perspective of at least two different classical ethical theories and present well reasoned arguments for your assessments and recommendations.
Suppose monetary advantages of an information system of $50,000 the 1st year and increasing benefits of $5000a year of the next four years year 1=$50,000;
At ABC Institute, researchers are unsure about type of key (Asymmetric or Symmetric) to be used. Formulate possible solution and explain advantages and disadvantages of any solution employed.
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