Crucial Exams

ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question

A utility company is deploying a wireless sensor network to measure pressure along a remote pipeline. Engineers warn that some sensor nodes could be physically captured by intruders, exposing any secret material stored on the device. Which architectural decision most directly limits the effect of such a node-capture event on the integrity of data sent by the remaining sensors?

  • Embed the encryption key directly in the firmware image so it never appears in memory after boot time.

  • Rely on link-layer cyclic redundancy checks (CRCs) to detect any alteration of packets in transit across the mesh.

  • Have every sensor authenticate and encrypt its traffic with a single pre-shared group key to minimize processing overhead.

  • Establish a distinct symmetric key between each sensor and the base station and reject traffic not authenticated with the correct per-node key.

ISC2 Certified Secure Software Lifecycle Professional (CSSLP)
Secure Software Architecture and Design
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