Code signing digitally signs code or firmware with a private key. A verifier checks integrity and authorization using a trusted public key, which may be provisioned directly or trusted through a certificate chain. Reject code when signature verification fails, content was modified after signing, or the signer is not authorized. Signing alone does not ensure that code is safe or that verification is enforced at boot.

Why it matters

Document update verification and signing-key lifecycle controls. Hardware-backed private-key protection may be appropriate to risk; avoid unsupported claims about the prevalence or severity of medical-device incidents caused by specific key-storage failures.

Common pitfalls

•Storing signing keys in CI/CD environment variables or unencrypted on build servers, keys belong in an HSM or hardware-backed key store.
•Using the same signing key across product lines and over many years, key rotation and per-product or per-release keys limit blast radius.
•Verifying signatures only at install time, not at boot, pair code signing with secure boot to defend against post-install tampering.

Sources

FDA Cybersecurity in Medical Devices guidance (February 2026) · FDA
NIST SP 800-57: Key Management · NIST
MDCG Cybersecurity Guidance · MDCG
NIST code-signing white paper · NIST
FDA final guidance, February 3, 2026 · FDA

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Why compare MedTech terms side by side?

MedTech terminology is full of pairs that look interchangeable but carry very different regulatory, clinical, and commercial consequences. Picking the wrong framework, pathway, or standard early in a project can add months to a submission, invalidate clinical evidence, or trigger an audit finding. Side-by-side comparison is the fastest way to surface those differences before they become costly mistakes.

Each comparison on this page pulls from the same vendor-neutral, sourced definitions used throughout the MedTech Terms glossary. You see the one-line summary, the formal definition, why it matters in practice, common pitfalls, and the primary sources (FDA guidance, EU MDR/IVDR articles, ISO/IEC standards, MDCG documents, IMDRF principles) that back each entry. That makes the comparison defensible in regulatory strategy memos, design reviews, and submission narratives.

Common comparison patterns

Regulatory pathway choice - 510(k) vs PMA, 510(k) vs De Novo, Abbreviated vs Special 510(k).
Quality systems - QSR vs ISO 13485, QMSR vs QSR.
Software classification - SaMD vs SiMD, Locked vs adaptive AI.
EU frameworks - MDR vs IVDR, CE Mark vs UKCA.
Cybersecurity artifacts - SPDX vs CycloneDX SBOM, CVE vs CVSS.
Post-market actions - Recall vs field action, Removal vs correction.

How to use this tool

Pick term A and term B from the dropdowns, or click a preset above. The URL updates with both slugs so you can bookmark or share the exact comparison with a colleague, a notified body reviewer, or your regulatory consultant. Click Open full page on either side for the complete entry, including FAQs, related terms, and the full citation list. If you are not sure which term to start with, browse the Categories view or the A-Z index.

MedTech Terms is a vendor-neutral community resource sponsored by Blue Goat Cyber. Definitions are written for educational use and are not legal or regulatory advice.