2.9. Given is a stream cipher which uses a single LFSR as key stream generator. The LFSR has a degree of 256. 1. How many plaintext/ciphertext bit pairs are needed to launch a successful attack? 2. Describe all steps of the attack in detail and develop the formulae that need to be solved. 3. What is the key in this system? Why doesn’t it make sense to use the initial contents of the LFSR as the key or as part of the key

Write a car class having two private member variables called tank and speed. write public methods called pumpgas and gofast. the method pumpgas gets an integer for gas that must be pumped. that value needs to be added to tank (no more than 20 gallons). it must return the amount of gas that is purchased ($4 per gallon). the method gofast should increase the speed by 5 each time it is called. write a constructor for the above class that initialized both variables to zero. write a tostring to display both the tank and speed when the car is printed. modify the car class to implement the interface comparable and an interface called carinter having the public methods in carinter. write the main program to create an array of size 5 of type car. create 5 car objects having each location of the array to refer to one of the cars. test the pumpgas, gofast, equals method on the array items. write an enhanced loop to print all the car values (using a tostring written last time).write a generic method to find the minimum of four items. pass int, double, char, string and car objects to test this method.

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What are the different parts of computer