An underground resistance group wants to write articles with completely differ- ent security goals. The resistance group shared a secret at the last resistance meeting that they can all use for these articles. Here are their goals:Only users with the shared secret should be able to upload to the server.Only users with the shared secret should be able to read the articles.Any changes to the article should still be easily detectableThe resistance is paranoid about both quantum computers and any mod- ern encryption algorithms so they want to avoid public key cryptography. They only trust AES (symmetric key encryption) and SHA-256 (crypto- graphic hashing) since these have been around for decades and are resistant to quantum computers.Write a protocol for the underground paper to authenticate authors before publishing to the server. (HINT: Make sure that this protocol cannot be tricked by someone who has been listening to the previous article upload)Write a protocol for the server to use to send out the published articles.

A protocol is a set of rules that govern how devices communicate with each other. It defines the…

Answered: An underground resistance group wants…

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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An underground resistance group wants to write articles with completely differ- ent security goals. The resistance group shared a secret at the last resistance meeting that they can all use for these articles. Here are their goals:

Only users with the shared secret should be able to upload to the server.
Only users with the shared secret should be able to read the articles.
Any changes to the article should still be easily detectable
The resistance is paranoid about both quantum computers and any mod- ern encryption algorithms so they want to avoid public key cryptography. They only trust AES (symmetric key encryption) and SHA-256 (crypto- graphic hashing) since these have been around for decades and are resistant to quantum computers.

Write a protocol for the underground paper to authenticate authors before publishing to the server. (HINT: Make sure that this protocol cannot be tricked by someone who has been listening to the previous article upload)
Write a protocol for the server to use to send out the published articles.

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