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If we define a hash function (or compression function) h that will hash an n-bit binary string to an m-bit binary string, we can view h as a function from Z2 to Z2m. It is tempting to define h using integer operations modulo 2m. We show in this exercise that some simple constructions of this type are insecure and should therefore be avoided.
a. Suppose that u = m > 1 and h : Z2 m → Z2m is defined as
h(x) = x2 + ax + b mod 2m.
Prove that it is easy to solve Second Preimage for any x Z2m without having to solve a quadratic equation.
Construct a tree diagram and list the sample space.
What year is it in Japan right now. This is a Math question and I believe it has something to do with with change in Calendar systems and the fact Japan drops a month.
use the method of substitution to solve the system of linear equation.
two tracking stations are on the equator 162 miles apart. a weather ballon is located on a bearing of n 43 from the western station and on a bearing of n 22 e from the eastern station. how far is the ballon from the western station? Round to the n..
How many batches of the topping must she make to complete her torte? (Use ? = 3.14 as an approximate value)
What is the maximum price the company should pay for each hour of additional molding time, and how many hours of molding time should they obtain at that price?
A Stirling number Snk is definedc as the number of ways of partitioning the set of positive numbers (1,2,3,....n) into k non empty subsets.
At what rate is the angle of inclination of the observers line of sight increasing at the instant when the balloon is exactly 500 feet above the ground?
Suppose X, Y, and Z are random variables with joint density function f(x, y, z) = Ce-(0.5x+0.2y+0.1z) if x 0, y 0, z 0, and f(x, y, z) = 0 otherwise.
What are some of the problems and drawbacks of the moving average forecasting model? How do you determine how many observations to average in a moving average model?
ace truck rental charges 54.00 a day plus 9 cent per mile. ronis truck rental charges 38.00 a day plus 13 cent per
In the course of deriving the formula T=2pi sqrt (L/g) for the period of a pendulum of length L,one obtains the equation a(T)= -gsin0 for the tangential acceleration of the bob of the pendulum.For small angles,find the linear approximation at 0for si..
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