Definition
Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation.
How it works
There are three core radiation hardening methodologies:
- Radiation Hardening by Process (RHBP): modifying the physical fabrication of a semiconductor (e.g., using SOI - Silicon on Insulator), offering the highest intrinsic protection. Usually the most expensive option as it requires a specialized semiconductor fabrication plant.
- Radiation Hardening by Design (RHBD): modifying circuit topology and physical layout using techniques such as Triple Modular Redundancy (TMR). A more cost-effective option, with the constraint of potentially increasing chip area and power.
- Radiation Hardening by Shielding (RHBS): using physical materials (e.g., aluminum or tantalum) to block ionizing particles. Simple to implement, with the constraint of increasing size and weight.
Implementation perspective
Radiation Hardening should be treated as a technical defensive capability rather than a product checkbox. In practice, teams should define the protected scope, the conditions under which the technique acts, and the observable evidence that demonstrates the intended behavior. For this technique, likely engineering context includes Hardware Device.
Use the technique to increase the effort, prerequisites, or constraints an adversary must overcome before exploitation or misuse succeeds.
Questions to ask
- Which component, configuration, credential, interface, or behavior is being hardened?
- What secure baseline or policy defines the intended state?
- How are exceptions approved, time-limited, and reviewed?
- How is the hardened state verified after deployment and significant change?
Evidence and validation
- Approved hardening standards and configuration baselines
- Automated configuration or integrity assessment results
- Exception records with owners, rationale, and expiration dates
- Test results demonstrating that the intended restriction is enforced
Common failure patterns
- A secure setting is documented but not enforced consistently across the environment.
- Hardening breaks required functions and is permanently weakened through undocumented exceptions.
- Teams measure deployment of a product rather than verification of the hardened condition.
This implementation perspective is original Bare Metal Cyber educational content. It does not replace the official D3FEND definition or establish that a specific product implements the technique.
Technique hierarchy
Top-level family
Parent techniques
Direct child techniques
Artifacts and ontology entities
These relationships describe how D3FEND connects a defensive technique to artifacts or other ontology entities. They describe graph semantics, not a product certification.
Explicit technique relationships
Show inferred artifact relationship paths (1)
Offensive-technique relationships
These relationships are generated from D3FEND graph paths and are explicitly experimental. They should be treated as hypotheses for defensive analysis—not as proof that the technique prevents, detects, or removes an offensive behavior.
ATT&CK Enterprise (11)
ATT&CK for ICS (2)
Authoritative sources
- Open this technique on the official D3FEND website ↗
- Open the official ontology resources ↗
- A Radiation-Hardened SAR ADC with Delay-Based Dual Feedback Flip-Flops for Sensor Readout Systems ↗Duckhoon Ro, Changhong Min, Myounggon Kang, Hyung-Min Lee · AcademicPaperReference
- Diagnosis of Faults Induced by Radiation and Circuit-Level Design Mitigation Techniques: Experience from VCO and High-Speed Driver CMOS ICs Case Studies ↗Danilo Monda, Gabriele Ciarpi, Sergio Saponara · AcademicPaperReference
- A Method of making thin atomic (Z) grade shields ↗NASA · Donald L. Thomsen, III · PatentReference
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