Crucial Exams

ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question

During an architecture review of a new IoT crop-monitoring solution, hundreds of battery-powered soil sensors will send data over an IEEE 802.15.4 multi-hop mesh (6LoWPAN) to a cloud gateway located at the edge of a farm where physical access by outsiders is possible. To mitigate the most significant security risk while keeping power consumption low, which design choice is MOST appropriate?

  • Provision each sensor with a unique pre-shared symmetric key stored in a secure element and enable 802.15.4 AES-CCM link-layer encryption for all frames

  • Replace 802.15.4 radios with Wi-Fi modules and protect traffic using WPA3-Enterprise

  • Rely on 802.15.4 collision-avoidance (CSMA/CA) alone and transmit sensor data in cleartext to conserve battery power

  • Digitally sign every telemetry message with XML Signature to ensure end-to-end integrity and authentication

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