Assume a computer network is being used to connect Alice and Bob. Imagine Trudy setting herself up on the network so she can intercept every packet Alice sends and send anything she wants to Bob. List a few of Trudy's negative behaviours from this point.

Assume a computer network is being used to connect Alice and Bob. Imagine Trudy setting herself up on the network so she can intercept every packet Alice sends and send anything she wants to Bob. List a few of Trudy's negative behaviours from this point.

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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Concept explainers

Network transmission cabling

A network is a collection of devices connected by communication links. A device can be a computer or any instrument capable of sending and receiving data or information formed by other nodes toward the network. A channel that connects people or things is known as a network. It sends the data from one place to another. It is the basic concept of a computer, network, and data communications.

Question

Assume a computer network is being used to connect Alice and Bob.
Imagine Trudy setting herself up on the network so she can intercept every packet
Alice sends and send anything she wants to Bob. List a few of Trudy's negative
behaviours from this point.

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Let's pretend that Alice and Bob are exchanging data packets across a network.Let's say Trudy infiltrates the network and is able to read all of Alice's data, then forwards it on to Bob along with whatever other information she chooses. Provide some examples of what kind of harm Trudy can do from this vantage point.
Suppose Alice and Bob are sending packets to each other over a computer network. Suppose Trudy positions herself in the network so that she can capture all the packets sent by Alice and send whatever she wants to Bob; she can also capture all the packets sent by Bob and send whatever she wants to Alice. List some of the malicious things Trudy can do from this position.
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This begs the question: why must the maximum packet lifetime be long enough to ensure that not only the packet but also its acknowledgements are lost?
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Why would it take the entire lifetime of the packet to make sure the packet, but also its acknowledgements, are lost?
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Over a network using WEP, we were able to capture two frames with the sameInitialization Vector (IV). The following are the encrypted messages:• First frame encrypted message:1 0 0 1 0 0 1 0 1 0 1 1 0 0 0 0 0 1 1 1 0 1 0 1 1 0 0 1 0 1 1 1 1 0 1 1 0 1 1 0 1 0 0 11 1 1 1 1 0 0 1 0 0 0 1 0 0 1 1 1 0 0 0• Second frame encrypted message:1 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 0 0 1 1 0 1 1 1 1 1 0 0 1 0 1 1 1 1 1 0 0 0 1 1 1 1 0 11 0 1 0 1 1 0 0 1 1 0 0 0 1 1 0 1 1 1 0We also know that one of the messages is a control message with the following plaintext content:0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 01 0 0 1 1 0 0 1 0 0 0 1 1 1 0 0 01. Find the plaintext of the other message.2. If the captured messages were from two different stations on a network that usesTKIP, is it possible to find the plaintext of the other message? Explain why orwhy not possible.