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ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question

While creating security test cases for a PRNG that supplies encryption keys for a new web service, you must determine which property to validate first. Which characteristic is most critical to confirm that the generator delivers cryptographic-grade randomness before the application goes live?

  • Confirm that the generator can output more than 2^64 unique values before any repetition occurs.

  • Run uniform-distribution tests to show every byte value appears within 0.5 % of expectation in a 1 GB sample.

  • Verify that the entropy collected for the initial seeding provides sufficient unpredictability, such as at least 256 bits for 256-bit security strength.

  • Measure the generator's throughput to ensure it can produce 10 MB of random data per second under peak load.

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