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1. Explain why private-public keys cannot be used in creating a MAC.
2. The nonce in Figure 31.22 is to prevent a replay of the third message. Eve cannot replay the third message and pretend that it is a new request from Alice, because when Bob receives the response, the value of RB is not valid anymore. This means that we can eliminate the first and the second message if we add a timestamp to the diagram. Show a new version of Figure 31.22 using a timestamp.
A load is drawing 10 A rms when connected to a 1200 V rms supply running at 50 Hz. If the source is operating at a lagging PF of 0.9, calculate (a) the peak voltage magnitude; (b) the instantaneous power absorbed by the load at t = 1 ms
What are the consequences of high harmonic distortion levels? and what are the Negative Consequences of Harmonics on Plant Equipment ?
Determine whether the Boolean funcions F=a'c+ab'c+ab and G=b'c+a'bc+abc+ab are equivalent using algebraic manipulation.
Derive an expression for the temperature distribution in a plane wall in whichdistributed heat sourcesvary according to the linear relation
Discuss how p and q can be estimated emperically from a histogram of (simulated) burst length and inter-error gap distributions. Estimate p and q.
Suppose that the number of customers entering a department store in a day is a random variable with mean of 50 customers/day. Suppose that the amounts of money spent by each one of these customers are statistically independent.
On a spacecraft two engines fire for a time of 541 s. One gives the craft an acceleration in the x direction of ax = 4.90 m/s2, while the other produces an acceleration in the y direction of ay = 7.60 m/s2.
What is specific application or product that might involve the z-transform and how is it relevant in the application or design of the application or porduct
1-mH inductor carries a current: i(t)=50*t^2*exp(-2*t) inunit of mA. Determine the voltage, power, and energy of the inductor as a function of time.
Find the clearance between the conductor and water at a point mid-way between the towers. Weight of conductor is 1 kg/m.
Find the inductance L in henries of the inductor of given figure. - Repeat part (a) if a ferromagnetic core is added having a µr of 2000.
onsider the difference equation- where x(k) is the output and x(k) = 0 for k
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