Diffie Hellman is a key exchange protocol and the first asymmetric scheme

Which of the following is the main reason that we use MAC?

Certificate Authorities (CA) issue digital signatures to certify the ownership of public keys

Show the step by step processes of how to get the original message m and how to ensure the message integrity after Bob receives E(Ks, E(KA– , H(m) || m)) and E(KB+, Ks) messages from Alice. The notation E(A, B) means that a message B is encrypted by the key A. You should clearly explain how Bob uses his private key (KB–), Alice’s public key (KA+), and the symmetric key (Ks).

WORK MUST BE SHOWN ON THIS QUESTION TO RECEIVE CREDIT. Provide an appropriate response. Find the area of the shaded region.  The graph depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15 (as on the Wechsler test.) (Round to 3 decimal places as needed.)

Determine which of the four levels of measurement is most appropriate. Temperatures of the ocean at various depths.

Find the mean for the given sample data. Eileen did some comparative shopping online and found the following six prices for cameras: $123.72       $226.13       $246.62       $288.16       $260.51       $224.39 What is the mean price?  Round your answer to the nearest cent.

Identify which type of sampling is used. A market researcher selects 500 people from each of 10 cities.

Determine whether the given procedure results in a binomial distribution.  If not, state the reason why.   Tossing a fair coin 10 times and noting the number of times that the coin lands heads up.

WORK MUST BE SHOWN ON THIS QUESTION TO RECEIVE CREDIT. Solve the problem. How many ways can the IRS auditor select 3 of 10 tax returns for an audit?