2.1.2 BWe will define a variation of OTP with a key length k = ki||k2 where |k1| =|k2| and M = C = {0,1}10, K = 0, 120. The encryption function :Enc(k = ki||k2, m) = m k1 e k2Complete the decryption algorithm. Prove that the scheme satisfies per-fect correctness and perfect secrecy. 1 Preface1. a||y is concatenation of two strings.2. We say that two “families" of distributions {D1,n, D2,n} over finite do-main D are not computationally distinguishable if for every polynomial1adversary A there exists a negligible function e(n) such that for everyn holds:|Pr[A(D1,n) = 1] – Pr[A(D2,n) = 1]| < e(n)For example, D1,n is G(Un) and D2n = U«n) where G is a PRG withexpansion function 1(n)2 Questions2.1 Q1For this question, every encryption scheme satisfies complete correctness.Security is for a single message.

Given 1 Preface 1. xlly is concatenation of two strings. 2. We say that two "families" of…

Answered: z||y is concatenation of We say that…

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z||y is concatenation of We say that two “famili

Database System Concepts

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ISBN:9780078022159

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

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

Chapter1: Introduction

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Question

2.1.2 B
We will define a variation of OTP with a key length k = ki||k2 where |k1| =
|k2| and M = C = {0,1}10, K = 0, 120. The encryption function :
Enc(k = ki||k2, m) = m k1 e k2
Complete the decryption algorithm. Prove that the scheme satisfies per-
fect correctness and perfect secrecy.

1 Preface
1. a||y is concatenation of two strings.
2. We say that two “families" of distributions {D1,n, D2,n} over finite do-
main D are not computationally distinguishable if for every polynomial
1
adversary A there exists a negligible function e(n) such that for every
n holds:
|Pr[A(D1,n) = 1] – Pr[A(D2,n) = 1]| < e(n)
For example, D1,n is G(Un) and D2n = U«n) where G is a PRG with
expansion function 1(n)
2 Questions
2.1 Q1
For this question, every encryption scheme satisfies complete correctness.
Security is for a single message.

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