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6. Consider the failed attempt of Alice to get Bob’s public key as shown in the following figure. Suppose that Bob and Alice already share a secret key, but Alice still wants Bob's public key. Is there now a way to get it securely? If so, how? 1. GET Bob's home page 2. Fake home page with ET Alice Trudy Bob 3. ET(Message) 4. Eg(Message) Trudy replaces Eg with ET and acts as a “man in the middle"

6. Consider the failed attempt of Alice to get Bob’s public key as shown in the following figure. Suppose that Bob and Alice already share a secret key, but Alice still wants Bob's public key. Is there now a way to get it securely? If so, how? 1. GET Bob's home page 2. Fake home page with ET Alice Trudy Bob 3. ET(Message) 4. Eg(Message) Trudy replaces Eg with ET and acts as a “man in the middle"

Database System Concepts
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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6. Consider the failed attempt of Alice to get Bob's public key as shown in the following figure. Suppose that Bob and Alice already share a secret key, but Alice still wants Bob's public key. Is there now a way to get it securely? If so, how? 1. GET Bob's home page 2. Fake home page with ET Alice Trudy Bob 3. ET(Message) 4. Ев (Мessage) Trudy replaces EB with ET and acts as a "man in the middle" Yes/No? How to implement it? Solution:
Transcribed Image Text:6. Consider the failed attempt of Alice to get Bob's public key as shown in the following figure. Suppose that Bob and Alice already share a secret key, but Alice still wants Bob's public key. Is there now a way to get it securely? If so, how? 1. GET Bob's home page 2. Fake home page with ET Alice Trudy Bob 3. ET(Message) 4. Ев (Мessage) Trudy replaces EB with ET and acts as a "man in the middle" Yes/No? How to implement it? Solution:
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