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ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question

While reviewing a new mobile banking app, the crypto lead proposes inventing a proprietary symmetric algorithm and relying on keeping its details hidden from attackers. You argue this contradicts the design guideline that a cryptosystem must remain secure even when everything except the secret key is public. Which principle are you invoking?

  • Security through obscurity

  • Kerckhoffs's Principle

  • Least common mechanism

  • Complete mediation

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