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ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question

While assessing a long-standing payment-processing system, you discover it relies on an in-house implementation of the SHA-256 hash. The team plans to replace this code with a mature, actively maintained cryptographic library that is already used elsewhere in the organization but does not hold a current FIPS validation. According to the component-reuse security design principle, what is the strongest justification for adopting the external library?

  • Standardizing on a single cryptographic library guarantees compliance with all relevant regulations.

  • Using the library eliminates the need for static code analysis in future release cycles.

  • The library will automatically rectify any future weaknesses in SHA-256 without redeploying the application.

  • Its broad peer review and ongoing maintenance make undiscovered implementation flaws far less likely than in the custom hashing code.

ISC2 Certified Secure Software Lifecycle Professional (CSSLP)
Secure Software Concepts
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