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Assume we have a very simple message digest. Our unrealistic message digest is just one number between 0 and 25. The digest is initially set to 0. The cryptographic hash function adds the current value of the digest to the value of the current character (between 0 and 25). Addition is in modulo 26. What is the value of the digest if the message is "HELLO"? Why is this digest not secure?
If a circuit has a 3.9 k ohms resistor and a 5 uF capacitor, find the current flow in the circuit at 0.005 seconds, if the maximum current flow in the circuit is 1.5 mA.
A Silicon wafer has a uniform doping density of 8 xl018 atoms cm-3 of Arsenic and 2.5 x 1019 atoms cm-3 of Phosphorus. Assume that all Arsenic atoms are fully (100%) ionized at room temperature but the Phosphorus atoms are 80% ionized.
calculate the total power received at rx if the power being transmitted is 20w the distance for transmission is 5km
A 25KW, 250V dc shunt generator has armature and field resistances of 0.06 ohm and 100 ohm respectively, determine the total armature power developed when working (1) as a generator delivering 25KW output and (2) as a motor taking 25KW
What is the magnitude and direction of the electric field along the axis of the ring?
Calculate the annual return on investment (ROI) in for the process improvement in Example 16.5 if the factory operates 300 days per year, but sells only 500 widgets per day.
Show the PS1 line before and after the frame, assuming the channel is idle before and after the frame.
The base class must also have a virtual print() function that displays the class name. Randomly assign print functions in three other classes that display the class name. Create 7 pointers of the base class and have them point to all the classes.
Determine the initial x(0+) and final value x(infinity), given the following Laplace transforms X(s): X(s) = 2s2 + 5/s3 + 3s + 1
An ideal C/D converter is followed by a discrete-time LPF which is followed by an ideal D/C converter. The sampling rate is 8000 samples per second. The input analog signal is bandlimited to 3900 Hz. The overall frequency response is required to s..
(a) Design a simple PNP current source to give an output current of IO = 0.5 mA (nominal value). The transistor parameters are f = 50, VEE = 10 V, VCC = 10V, |VBE| = 0.7 V, |VCEsat| = 0.3 V and VA = 50 V (for all transistors)
Design and model a car battery charger using PSpice. Suppose that the source is a commercial circuit of 240V AC at 60Hz. The battery to recharge is 12V DC.
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