ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question

While designing firmware updates for smart door locks in a corporate campus, you must ensure the locks are fail safe. If the update process crashes mid-way, which behavior best embodies the fail-safe principle?

  • The lock disables all authentication checks and accepts any remote open command for troubleshooting.

  • The lock stays locked and can be opened only with a physical master key until the firmware is successfully restored.

  • The lock reboots every minute and retries the update, temporarily disabling normal lock functions.

  • The lock automatically unlocks so occupants and technicians can enter and fix the issue.

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