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Please answerv the following questions:-<br />
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<a href="http://www.dkeirle.com/images/etheral.jpg" rel="ugc">http://www.dkeirle.com/images/etheral.jpg</a><br />
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a) The screen shot shown in figure Q4 (see link) depicts a trace of network activity of a web based connection to the University e-mail service. Discuss whether you think this is a secure method of accessing messages, through consideration of the trace. <br />
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b) Part of the trace shows a Change Cipher Spec activity taking place. &nbsp; &nbsp;Discuss this and describe what you think further analysis would show if the “Client Hello” information was analysed.<br />
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c) Discuss the “Server Hello” and subsequent operations, including the contents of the “Application Data”.<br />
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Please answerv the following questions:-

http://www.dkeirle.com/images/etheral.jpg

a) The screen shot shown in figure Q4 (see link) depicts a trace of network activity of a web based connection to the University e-mail service. Discuss whether you think this is a secure method of accessing messages, through consideration of the trace. 

......

b) Part of the trace shows a Change Cipher Spec activity taking place.    Discuss this and describe what you think further analysis would show if the “Client Hello” information was analysed.

......

c) Discuss the “Server Hello” and subsequent operations, including the contents of the “Application Data”.

......





Past exam questions (network trace)

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.

Security

Encryption is the process of encoding messages or information in such a way that only authorized parties can read it. In an encryption scheme, the intended communication information or message, referred to as plaintext, is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients, but not to unauthorized interceptors.