69. A software developer wishes to implement an application security technique that will provide assurance of the application's integrity, Which of the following techniques will achieve this?
Answer: D
Code signing provides assurance of the application's integrity.
Code signing is a technique that allows developers to digitally sign their applications, ensuring that the code has not been altered or corrupted since it was signed. This verification process helps establish the integrity of the application, providing assurance to users that it is safe to execute.
A) Secure cookies
Secure cookies are a mechanism for enhancing the security of cookies by ensuring they are only sent over secure HTTPS connections. While they protect cookie data during transmission, they do not provide any assurance regarding the integrity of the application itself, making them irrelevant to the question of application integrity.
B) Input validation
Input validation is a technique used to ensure that the data provided by users is correct and safe for processing. Although it helps prevent malicious input from compromising an application, it does not inherently verify the integrity of the application code, thus failing to meet the requirement of assuring application integrity.
C) Static analysis
Static analysis involves examining the code for potential vulnerabilities without executing it. While it can identify issues that may affect the application's security, it does not provide assurance that the code has not been altered or tampered with after it was created, which is essential for guaranteeing application integrity.
D) Code signing
Code signing is the correct technique that provides assurance of the application's integrity. It involves using cryptographic techniques to sign the application, allowing users to verify that the software has not been modified since it was signed. This ensures that the application is authentic and trustworthy.
Conclusion
Code signing is the definitive technique for assuring an application's integrity as it enables verification of the code's authenticity and prevents tampering. Other options, such as secure cookies, input validation, and static analysis, do not directly address the integrity of the application itself, making them inadequate for this purpose.