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Problem
(i) Suppose Alice wants to send a long message m to Bob. If Alice and Bob already share a secret key k, and they use HMAC to protect integrity of the message m, what should the message format be (or what components should the message have)?
(ii) Suppose h=H(m), where H is a cryptographic hash function. Is it feasible for an attacker to derive m from h?
Extend the editing of vehicles to allow editing of the weight (importance) of a sensor in determining the motion of the vehicle.
Write a program like that of the previous exercise that converts from kilograms and grams into pounds and ounces. Use functions for the subtasks.
Briefly explain the idea behind the EIGamal cryptosystem. What is the one-way function in this system? What is the trapdoor in this system?
How many bits are needed for the opcode? How many bits are left for the address part of the instruction? What is the maximum allowable size for memory?
A printer has an 8-bit parallel Centronics interface that consists of an 8-bit parallel data bus and three control lines. DSTB* is an active-low pulsed data.
List two features of the asynchronous connection that allow the receiver to stay in sync with the incoming data stream.
Prepare a schematic design of the five-stage multiply pipeline. All line widths and inter-stage connections must be shown.
How many page misses can the random algorithm incur on the following page request sequence: (2,3,4,1,2,5,1,3,5,4,1,2,3)?
Derive the effective memory-access times per instruction for the write-through and write-back caches separately.
Write down a function that uses a switch statement to determine the number of the nearest cross street for a given address and avenue number according to the preceeding alogorithm. Then write a program to test your function.
For this project you will build a simple Geographic Information System for storing point data. The focus is organizing city records into a database for fast search. For each city you will store the name and its location (X and Y coordinates). Sear..
In the recursive calculation of Fn , determine exactly how many times each smaller Fibonacci number will be calculated.
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