4. Using the Finite Galois Field, solve the operation of 01.89 002.F1 003.18 Đ01.4E (the given strings are in Hexadecimal). Give steps by steps details of your calculation. 5. Using the simplified RC4 Algorithm of 8 bytes (rather than the full 256 bytes), find the final Keystream and Cipherpext of the following Input string: S-Array of length 8, [SO S1 S2 S3 S4 S5 S6 S7] = [o 1 2 3 4 5 6 7] Key, K = [3 1 4 1 5] Plaintext, PT = [6 1 5 4] Hint: For the simplified stream generation, you can use this pseudocode (only up to the PT length):

4. Using the Finite Galois Field, solve the operation of 01.89 002.F1 003.18 Đ01.4E (the given strings are in Hexadecimal). Give steps by steps details of your calculation. 5. Using the simplified RC4 Algorithm of 8 bytes (rather than the full 256 bytes), find the final Keystream and Cipherpext of the following Input string: S-Array of length 8, [SO S1 S2 S3 S4 S5 S6 S7] = [o 1 2 3 4 5 6 7] Key, K = [3 1 4 1 5] Plaintext, PT = [6 1 5 4] Hint: For the simplified stream generation, you can use this pseudocode (only up to the PT length):

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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Question

4. Using the Finite Galois Field, solve the operation of 01.89 Đ02.F1003.18 Đ01.4E
(the given strings are in Hexadecimal). Give steps by steps details of your calculation.
5. Using the simplified RC4 Algorithm of 8 bytes (rather than the full 256 bytes), find
the final Keystream and Cipherpext of the following Input string:
S-Array of length 8, [SO S1 S2 S3 S4 S5 S6 S7] = [0 1 2 3 4 5 6 7]
Key, K = [3 14 1 5]
Plaintext, PT = [6 1 5 4]
Hint: For the simplified stream generation, you can use this pseudocode (only up to
the PT length):
/* Initialization */ set i and j = o
for i = i+ 1 to length of PT
j = j + S[i] mod 8
[IS []s doms
t = S[i] + S[j] mod 8
Keystream =
end for

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