RC4 has a secret internal state which is a permutation of all the possible values of the vector S and the two indices i and j a. Using a straightforward scheme to store the internal state, how many bits are used? b. Suppose we think of it from the point of view of how much information is represented by the state. In that case, we need to determine how may different states there are, then take the log to the base 2 to find out how many bits of information this represents. Using this approach, how many bits would be needed to represent the state?

RC4 has a secret internal state which is a permutation of all the possible values of the vector S and the two indices i and j a. Using a straightforward scheme to store the internal state, how many bits are used? b. Suppose we think of it from the point of view of how much information is represented by the state. In that case, we need to determine how may different states there are, then take the log to the base 2 to find out how many bits of information this represents. Using this approach, how many bits would be needed to represent the state?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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RC4 has a secret internal state which is a permutation of all the possible values of the vector S and the two indices i and j a. Using a straightforward scheme to store the internal state, how many bits are used? b. Suppose we think of it from the point of view of how much information is represented by the state. In that case, we need to determine how may different states there are, then take the log to the base 2 to find out how many bits of information this represents. Using this approach, how many bits would be needed to represent the state?
One way to avoid Runge's problem is to choose non-equally spaced data points. A particularly good set to choose are the so-called Chebyshev nodes. To use these, replace the equidistant points xk produced by xeq with xk = COS 2k+1 2n+2 for k=0,..., n. (3.4) Generate data points using (3.4) and (3.3), then plot the resulting Lagrange interpolating polynomial and, hence, show that using (3.4) solves the Runge problem.
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Please help number 1.b) ,make sure that i can understand what you write
Answer this question The pattern displayed in the shown 3x2 grid is converted into input vector p by scanning it in column-major order. Each white circle will be represented by a "5", and each dark circle will be represented by a "-5". Then p will be: Select the correct answer A [-1.5 -1.5 -1.5 1.5 1.5 -1.5]T B [-17.5 -17.5 -17.5 17.5 17.5 -17.5]T -5 -5 -5 5 5 -5]T C D -3.5 E [-3 -3.5 -3.5 3.5 3.5 -3.5]T -3 -3 3 3 -3] T OO