2. (PRGS) Let G : {0, 1}" → {0, 1}2 be a PRG and let H: {0,1}²n → {0, 1}" be a collision resistant hash function. Argue whether each of the following candidates is or is not a secure PRG.| def (a) G'(x) G(H(x||x)) def (b) G"(x)H(G(x))||H(G(x)) def (c) G" (x)G(x)||H(G(x))
2. (PRGS) Let G : {0, 1}" → {0, 1}2 be a PRG and let H: {0,1}²n → {0, 1}" be a collision resistant hash function. Argue whether each of the following candidates is or is not a secure PRG.| def (a) G'(x) G(H(x||x)) def (b) G"(x)H(G(x))||H(G(x)) def (c) G" (x)G(x)||H(G(x))
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Please do not rely too much on chatgpt, because its answer may be wrong. Please consider it carefully and give your own answer. You can borrow ideas from gpt, but please do not believe its answer.Very very grateful!Please do not rely too much on chatgpt, because its answer may be wrong. Please consider it carefully and give your own answer. You can borrow ideas from gpt, but please do not believe its answer.
Very very grateful!

Transcribed Image Text:2. (PRGS) Let G : {0, 1}" → {0, 1}2 be a PRG and let H: {0,1}²n → {0, 1}" be a
collision resistant hash function. Argue whether each of the following candidates
is or is not a secure PRG.|
def
(a) G'(x) G(H(x||x))
def
(b) G"(x)H(G(x))||H(G(x))
def
(c) G" (x)G(x)||H(G(x))
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