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Foundation of Cyber Security Assignment Help

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Module Code: CTEC5801

Title of the Assignment: Combined Coursework

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The learning outcomes that are assessed by this coursework are:     

1. Create a new or modify an existing C program in order to complete a given specification

Answer: To modify or create a C program to meet a specific requirement, we first need to thoroughly understand the desired functionality. This involves breaking down the problem into smaller, manageable steps. Next, we analyze the existing code (if any) to identify areas for modification or potential issues. We then implement the necessary changes, ensuring adherence to C programming standards and best practices. This may involve adding new functions, modifying existing ones, or altering data structures. Throughout the process, we rigorously test the code to verify its correctness and efficiency. If the program is new, we start by defining the core logic and structure, gradually adding features and refinements. By following these steps, we can effectively create or modify C programs to fulfill specific needs.

2. Explain and demonstrate understanding of an operating system's persistent storage

Answer: Persistent storage in an operating system refers to non-volatile memory devices that retain data even after the system is powered off. This is crucial for storing files, applications, and system settings. Common types include hard disk drives (HDDs), solid-state drives (SSDs), and USB drives. The operating system manages these devices through a file system, which organizes data into hierarchical directories and files. When a file is saved, the operating system writes the data to the storage device. To retrieve a file, the operating system reads the data from the device and presents it to the user. This seamless interaction between the operating system and persistent storage allows us to save, access, and modify data across multiple system sessions.

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3. Evaluate and justify the use of cryptographic tools and techniques in an application context

Answer: Cryptographic tools and techniques are essential for safeguarding sensitive data in various applications. Symmetric-key encryption, like AES, ensures confidentiality by encrypting data with a shared secret key. Asymmetric-key encryption, such as RSA, enables secure communication and digital signatures using public and private key pairs. Hash functions, like SHA-256, create unique digital fingerprints for data integrity verification. Digital signatures, combining asymmetric encryption and hash functions, authenticate the sender and data integrity. In e-commerce, these techniques protect transactions and personal information. In secure communication protocols like HTTPS, they encrypt data transmission. By carefully selecting and implementing appropriate cryptographic tools and techniques, organizations can significantly enhance the security of their applications and protect valuable assets.

4. Critically analyse network traffic to identify potential vulnerabilities 5. Relate knowledge of topics to cyber security domain

Answer: Network traffic analysis is a crucial cybersecurity technique to identify potential vulnerabilities. By examining network packets, security analysts can detect anomalies, unauthorized access attempts, and malicious activity. Analyzing traffic patterns can reveal weaknesses in network configurations, outdated software, or misconfigurations. Identifying vulnerabilities in network protocols, such as outdated versions or insecure settings, is essential. Additionally, monitoring for unusual traffic, such as large data transfers or unusual port usage, can indicate potential breaches. By correlating network traffic analysis with other security measures like intrusion detection systems and firewall logs, a comprehensive security posture can be achieved. Understanding these techniques is vital for cybersecurity professionals to protect networks from cyber threats.

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Tasks to be undertaken:

Task 1: Write a C program to implement a Vigenère cipher. You may use whatever IDE you wish but the program must be compile with the standard gcc compiler. Your program should give the user the option to either encrypt or decrypt a message. The user should be prompted to enter the passphrase to be entered and the keyword to be used in the cipher. The output should be text printed to stdout. Comments should be used to explain the rationale behind the design of your code. You must also provide a critical analysis as to the robustness of the Vigenère cipher and provide a recommendation as to whether or not it would be it would be sufficient for use in communications between colleagues within a non-technical environment.

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Task 2: In your role as an Information Security Specialist for Global Designs Limited, you have been tasked with creating a set of policies for secure data. The data stored by Global Designs Ltd has a useful lifetime of 1 year, after which it is deleted. This deletion is done simply using the delete functionality of the Operating System. You are required to determine if this is adequate to fully delete the data, if not provide potential ways to recover the data and recommendations for how the data could be securely destroyed. They have asked that the report contains an overview of how data is deleted and recovered at a level the non-technical staff can understand as well as a more technical explanation of the architectural differences between the two for the IT Department. You may include any images or other supporting material within a single appendix.

The report should not exceed 1,500 words.

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Task 3: In your role as a consultant for Data Storage Solutions, you have been tasked with providing a report into the current state of the art encrypted e-mail solutions. Identify if information can be extracted from e-mails if the network traffic has been intercepted. If it can, identify how the solutions you have assessed solve this problem. Different existing solutions should be considered, critically analysed and compared. Additionally, an overview of the current state of the art research in the field should be included. At the end of the report, clear guidelines should be included detailing when it would be most appropriate to use each solution covered in the main report.

The report should not exceed 1,500 words.

Task 4: Download the pcap file CTEC5801_coursework.pcap and analyse the traffic. Identify, analyse and explain all connections and interactions you can identify. Assess whether or not any of the connections might be suspicious, identify these and explain why they might pose a danger.

You must include:

  • Start frame
  • Mac address of host initiating the connection
  • Mac address of destination host
  • IP address of host initiating connection
  • IP address of destination host
  • The port used by the initialising host
  • The port used by the destination host

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