A smart utility company deploys thousands of IoT smart meters to transmit real-time electrical grid telemetry back to a central collection server. During a technical security evaluation of the device firmware binary, security analysts discover that all smart meters utilize a single, identical AES key compiled directly into the executable code to encrypt outgoing telemetry payloads. Which cryptographic weakness is present in this deployment, and what is the main security risk associated with it?
- Hardcoded cryptographic key reliance, which allows an adversary who extracts the secret key from a single physical smart meter to decrypt telemetry transmissions from all devices across the enterprise.Cevap
- BIncorrect cryptographic algorithm selection, caused by utilizing high-overhead symmetric bulk encryption instead of lightweight asymmetric ciphers on constrained IoT microcontrollers.
- COver-reliance on perimeter security controls, resulting from an architectural failure to wrap the smart meter telemetry stream inside a dedicated perimeter firewall boundary.
- DInappropriate control selection, caused by attempting to mitigate payload confidentiality vulnerabilities using application-layer content filters instead of stateless network packet filtering.
Cevap
Hardcoded cryptographic key reliance, which allows an adversary who extracts the secret key from a single physical smart meter to decrypt telemetry transmissions from all devices across the enterprise.
Hardcoding secret cryptographic keys inside distributed application or firmware binaries is a critical security vulnerability. Anyone with physical or remote access to a single device can perform static analysis or memory dumps to extract the key, allowing them to decrypt traffic from every other device using that same shared key.
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Hardcoded and Shared Cryptographic Key Vulnerabilities