CDS 390 Applied Network Security

CDS 390

Applied Network Security

LAB CHALLENGE QUESTIONS

Lab 01

1. In the PacketCapture.pcapng file you reviewed in Section 1, there is a lot of traffic for TLSv1. What is the purpose of this traffic?

Web security has become a major concern, thus, encrypted-traffic has continued to be developed among them being HTPS, URL and filtering using address mapping that is DNS interception and TLS. The Transport Layer Security is the actual data transfer accomplished by Record Protocol. The main purpose of TLSv1 is to provide data integrity and privacy. It allows browsers to securely exchange data over a network such as Voice over IP, file transfers, instant messaging and VPN. Commonly, websites are using HTPPS protocol to protect user private data from network-based attacks. However, combining it with TLS padding enforcement is becoming a new trend in web security. TLS padding enforce web-specific privacy policies.

TLSv1 was develop to provide data integrity between two communication ends, either client server or client to client networks. The protocol is preferred due to the following properties;

Communicating properties can be identified and have to be authenticated using public-key cryptography. It requires on or two servers to authenticate it. Secondly, the connection is reliable since each transmitted message contains a message integrity check done through message integrity authentication code that prevents undetected or altered data from being transmitted.

Thirdly, the connection is private or secured since it involves systemic cryptography used for data transcription encryption. The encryption keys are generated uniquely in every connection while sharing secret negotiation during the start of a session i.e. TLS handshake. The client server negotiates encryption algorithm and cryptographic keys to be used before first byte data transmission secretly hence making it secure.

2. Apply a filter to the WiFiPacketCapture.pcapng file that will display only the packets related to Address Resolution Protocol (ARP). Identify the device used and make a screen capture showing the results of the filtered data.

Lab 02

3. Using NetWitness Investigator, identify the file transferred in the HotSpotCapture.pcap file. Make a screen capture showing the details that led you to that discovery.

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