Project White And Black Box Test Cases Overview

Project White And Black Box Test Cases Overview

Using the text, Traditional Software Engineering Phases, provided in the first week of the course, develop one White Box and Black Box test case for the ATM system that was the subject of previous assignments. Your Black Box test case should address one of the threats you identified in an earlier assignment. Design the Black Box test case to determine if the threat is mitigated by the design. The White Box test case can verify any internal logic function or operation.

Each White Box and Black Box test cases should focus on one feature/function of the ATM system. Use your high-level design of your ATM system that you developed in an earlier assignment as the basis for your test cases. Define the test data, test steps, and any test tools that you would employ to perform testing. Your report should be well-organized and provide references for all resources used.

Paper For Above instruction

Title: White and Black Box Test Cases for ATM System Security and Functionality

Introduction

Software testing is an essential process in ensuring the functionality, security, and reliability of systems, especially in critical applications like Automated Teller Machines (ATMs). Proper testing methodologies, including white box and black box testing, help identify vulnerabilities and verify the correctness of internal processes and external behaviors. This paper presents a comprehensive overview of developing one white box and one black box test case for an ATM system, focusing on specific features and threats, aligned with the principles outlined in the "Traditional Software Engineering Phases."

White Box Testing for the ATM System

White box testing involves examining the internal logic, code structure, and operational pathways within the software. For the ATM system, a critical feature to test at this level is the PIN authentication process. Ensuring this function correctly verifies user identities and handles incorrect entries is vital for both security and usability.

Test Objective

The objective of the white box test is to verify that the internal PIN verification algorithm correctly authenticates valid PINs and rejects invalid ones, including edge cases like multiple failed attempts leading to account lockout.

Test Data and Steps

  • Test Data: Valid PIN (e.g., 1234), invalid PIN (e.g., 0000), maximum failed attempts (e.g., 3 consecutive incorrect entries)
  • Test Steps:
  1. Input a valid PIN and verify successful authentication
  2. Input an invalid PIN and verify rejection with an error message
  3. Repeat invalid PIN entries up to the maximum allowed attempts and verify account lockout occurs

Test Tools

Unit testing frameworks like JUnit (for Java) or NUnit (for C#) can be employed to isolate and verify the PIN validation function, especially if the internal code is accessible or can be mocked.

Black Box Testing for the ATM System

Black box testing assesses the system's external functionality without internal code knowledge. One significant threat previously identified is the possibility of SQL injection attacks through the PIN entry interface, which could compromise user data.

Test Objective

The aim is to verify whether the ATM’s PIN entry interface is protected against malicious injection attempts, effectively mitigating the threat of SQL injection exploiting the input form.

Test Data and Steps

  • Test Data: Injection payloads such as " OR '1'='1'; -- ", "'; DROP TABLE users; -- ", or other common SQL injection strings
  • Test Steps:
  1. Enter SQL injection payloads into the PIN entry field
  2. Attempt to submit the input and observe system response
  3. Verify that no unauthorized access is granted and that input is sanitized or rejected appropriately

Test Tools

Tools like OWASP ZAP or Burp Suite can be used for automated security testing and to simulate injection attacks, analyzing the system's resilience against such threats.

Analysis and Expected Outcomes

The white box test is expected to confirm that the PIN verification logic correctly authenticates users and handles edge cases securely. The black box test should demonstrate that attempts to exploit input vulnerabilities are ineffective, thus ensuring the system's security against SQL injection threats.

Conclusion

Combining white box and black box testing approaches provides a comprehensive validation of the ATM system's internal logic and external security. The white box test verifies internal correctness, while the black box test assesses the system's resilience against external malicious threats. Together, these methods enhance confidence in the system’s robustness and security posture.

References

  • Beizer, B. (1990). Software Testing Techniques. Van Nostrand Reinhold.
  • Cem Kaner, J., Falk, J., & Nygaard, H. (1999). Testing Computer Software. Wiley.
  • OWASP Foundation. (2023). OWASP Top Ten Security Risks. https://owasp.org/www-project-top-ten/
  • Myers, G. J., Sandler, C., & Badiru, A. (2011). The Art of Software Testing. John Wiley & Sons.
  • Pressman, R. S. (2014). Software Engineering: A Practitioner's Approach. McGraw-Hill Education.
  • McGraw, G. (2004). Software security: building security in. IEEE Security & Privacy, 2(2), 80-83.
  • OWASP ZAP. (2023). OWASP Zed Attack Proxy Project. https://owasp.org/www-project-zap/
  • Burp Suite. (2023). PortSwigger. https://portswigger.net/burp
  • Jorgensen, P. C. (2013). Software Testing: A Craftsman's Approach. CRC Press.
  • Fenton, N. E. (1991). Software Measurement: A Reusable Approach. Chapman & Hall.

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