could you please code this on notepade. The Feistel cipher is a symmetric block cipher encryption framework which is the basisof many modern day encryption algorithms. In this coursework you will implement aFeistel cipher system as a hardware component and as a software implementation. In aFeistel cipher the plaintext, P, to be encrypted is split into two equal size parts Lo andRo such thatP = L,Ro- A function F is applied to one half of the plaintext, combinedwith a key, and the result is XOR'd with the other half of the plaintext. Feistel ciphersoften employ multiple rounds of this scheme. In general the scheme works as follows, forall i = 0, .. . , n,L;+1= R;R+1 = L; © F(R, K;)To decrypt an encrypted message using this cipher we can apply the same procedurein reverse. For i = n, n – 1, . , 0,R; = L,+1Lat1L, = R,-1 e F(L,-1, K.)For this coursework we are interested in the 16-bit Feistel cipher which uses 4 rounds.The function F(A, B) = AOB. The keys are derived from a single 8-bit key Ko such that,Ko = b,b6b;b4b3bzbi boK1 = b6b5b,b3b2bibob,K2 = b;b,bzb,b,bob-b6K3 = b,b3b2b1bob-b6b51 The Feistel cipher is a symmetric block cipher encryption framework which is the basisof many modern day encryption algorithms. In this coursework you will implement aFeistel cipher system as a hardware component and as a software implementation. In aFeistel cipher the plaintext, P, to be encrypted is split into two equal size parts Lo andRo such thatP = L,Ro- A function F is applied to one half of the plaintext, combinedwith a key, and the result is XOR'd with the other half of the plaintext. Feistel ciphersoften employ multiple rounds of this scheme. In general the scheme works as follows, forall i = 0, .. . , n,L;+1= R;R+1 = L; © F(R, K;)To decrypt an encrypted message using this cipher we can apply the same procedurein reverse. For i = n, n – 1, . , 0,R; = L,+1Lat1L, = R,-1 e F(L,-1, K.)For this coursework we are interested in the 16-bit Feistel cipher which uses 4 rounds.The function F(A, B) = AOB. The keys are derived from a single 8-bit key Ko such that,Ko = b,b6b;b4b3bzbi boK1 = b6b5b,b3b2bibob,K2 = b;b,bzb,b,bob-b6K3 = b,b3b2b1bob-b6b51

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The Feistel cipher is a symmetric block cipher encryption framework which is the basis of many modern day encryption algorithms. In this coursework you will implement a Feistel cipher system as a hardware component and as a software implementation. In a Feistel cipher the plaintext, P, to be encrypted is split into two equal size parts Lo and Ro such that P = L,Ro- A function F is applied to one half of the plaintext, combined with a key, and the result is XOR'd with the other half of the plaintext. Feistel ciphers often employ multiple rounds of this scheme. In general the scheme works as follows, for all i =0, . ..,n, L+1 = R, R+1 = L, © F(R,, K,) To decrypt an encrypted message using this cipher we can apply the same procedure in reverse. For i = n, n –1, . ,0, R, = L,+1 L, = R,-1 © F(L+1, K.) For this coursework we are interested in the 16-bit Feistel cipher which uses 4 rounds. The function F(A, B) = A€B. The keys are derived from a single 8-bit key Ko such that, Ko = b,bgb;b,b3b2b, bo K1 = bøbzbab3b2b,bob- K2 = b;b,b3b>b,bob-bs K3 = b,bzb2b,bobrbebs

The Feistel cipher is a symmetric block cipher encryption framework which is the basis of many modern day encryption algorithms. In this coursework you will implement a Feistel cipher system as a hardware component and as a software implementation. In a Feistel cipher the plaintext, P, to be encrypted is split into two equal size parts Lo and Ro such that P = L,Ro- A function F is applied to one half of the plaintext, combined with a key, and the result is XOR'd with the other half of the plaintext. Feistel ciphers often employ multiple rounds of this scheme. In general the scheme works as follows, for all i =0, . ..,n, L+1 = R, R+1 = L, © F(R,, K,) To decrypt an encrypted message using this cipher we can apply the same procedure in reverse. For i = n, n –1, . ,0, R, = L,+1 L, = R,-1 © F(L+1, K.) For this coursework we are interested in the 16-bit Feistel cipher which uses 4 rounds. The function F(A, B) = A€B. The keys are derived from a single 8-bit key Ko such that, Ko = b,bgb;b,b3b2b, bo K1 = bøbzbab3b2b,bob- K2 = b;b,b3b>b,bob-bs K3 = b,bzb2b,bobrbebs

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

could you please code this on notepade.

The Feistel cipher is a symmetric block cipher encryption framework which is the basis
of many modern day encryption algorithms. In this coursework you will implement a
Feistel cipher system as a hardware component and as a software implementation. In a
Feistel cipher the plaintext, P, to be encrypted is split into two equal size parts Lo and
Ro such thatP = L,Ro- A function F is applied to one half of the plaintext, combined
with a key, and the result is XOR'd with the other half of the plaintext. Feistel ciphers
often employ multiple rounds of this scheme. In general the scheme works as follows, for
all i = 0, .. . , n,
L;+1= R;
R+1 = L; © F(R, K;)
To decrypt an encrypted message using this cipher we can apply the same procedure
in reverse. For i = n, n – 1, . , 0,
R; = L,+1
Lat1
L, = R,-1 e F(L,-1, K.)
For this coursework we are interested in the 16-bit Feistel cipher which uses 4 rounds.
The function F(A, B) = AOB. The keys are derived from a single 8-bit key Ko such that,
Ko = b,b6b;b4b3bzbi bo
K1 = b6b5b,b3b2bibob,
K2 = b;b,bzb,b,bob-b6
K3 = b,b3b2b1bob-b6b5
1

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