--- title: "HRoT, Hardware Root of Trust | MedTech Terms" description: "A tamper-resistant hardware element (TPM, secure element, or fused boot ROM) that provides the foundational, unforgeable trust anchor for secure boot,…" lang: en json-ld: | { "@context": "https://schema.org", "@graph": [ { "@type": "DefinedTerm", "@id": "https://medtechterms.com/terms/hardware-root-of-trust#term", "name": "Hardware Root of Trust", "alternateName": [ "HRoT", "Root of Trust", "RoT" ], "description": "A hardware root of trust is a tamper-resistant hardware component, typically a Trusted Platform Module (TPM 2.0), a vendor secure element, an ARM TrustZone protected region, or one-time-programmable fuses holding immutable boot code and public keys, that serves as the anchor for all higher-level security guarantees. 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[Home](/) 2. / 3. [Terms](/terms) 4. / 5. [Cybersecurity](/terms?cat=Cybersecurity) 6. / 7. Hardware Root of Trust [All terms](/terms) Cybersecurity [Connected & Cyber-Physical Devices](/ecosystems/connected-devices)HRoT # Hardware Root of Trust A tamper-resistant hardware element (TPM, secure element, or fused boot ROM) that provides the foundational, unforgeable trust anchor for secure boot, attestation, and key storage. Reviewed by [Christian Espinosa, Founder, Blue Goat Cyber](/authors/christian-espinosa) Last reviewed June 20, 2026 ## Definition A hardware root of trust is a tamper-resistant hardware component, typically a Trusted Platform Module (TPM 2.0), a vendor secure element, an ARM TrustZone protected region, or one-time-programmable fuses holding immutable boot code and public keys, that serves as the anchor for all higher-level security guarantees. Because the hardware can't be replaced or reprogrammed by software running on the device, any chain of trust it certifies ( [secure boot](/terms/secure-boot), signature verification, attestation reports, key release) is rooted in a property an attacker can't change without physical access and specialized equipment. What the regulation says FDA's 2023 Cybersecurity in Medical Devices guidance expects manufacturers to describe 'cryptographic key generation, storage, and lifecycle management.' [IEC 81001-5-1](/terms/iec-81001-5-1) and [AAMI SW96](/terms/aami-sw96) expect tamper-resistant storage for security-critical keys. The [HSCC Joint Security Plan](/terms/hscc-jsp) lists hardware roots of trust as an expected architecture pattern. ## What this means in practice On modern connected medical devices, every meaningful security claim, [secure boot](/terms/secure-boot), signed-update verification, certificate-based device identity, remote attestation, full-disk encryption, terminates in a hardware root of trust. FDA premarket cybersecurity submissions are expected to describe the device's roots of trust and how cryptographic keys are protected at rest. Devices that store keys in flash or in software-only key stores cannot credibly claim the security capabilities FDA expects. Common pitfalls - • Calling a software-only secure key store a 'root of trust', without hardware tamper resistance, it isn't. - • Provisioning the same root keys across many devices in manufacturing, per-device unique keys are required for credible device identity. - • Ignoring supply-chain attestation of the secure element itself, a compromised secure element undermines every claim above it. ## Related terms Grouped by theme ### Editor's picks · Hand-selected related concepts [ Cybersecurity AAMI SW96 AAMI/ANSI standard establishing requirements for medical-device cybersecurity activities throughout the lifecycle. ](/terms/aami-sw96)[ Cybersecurity Code Signing Cryptographic signing of executable software and firmware so that only authentic, unmodified code from a trusted publisher will run. ](/terms/code-signing)[ Cybersecurity Cryptographic Agility The designed-in ability to replace cryptographic primitives over a device's supported lifetime. ](/terms/crypto-agility)[ Cybersecurity IEC 81001-5-1 International standard defining secure-product-lifecycle activities for health software, including medical devices. ](/terms/iec-81001-5-1) ### More in Cybersecurity · Same category [ Cybersecurity Premarket Cybersecurity Submission The bundle of cybersecurity artifacts a sponsor includes in a 510(k), De Novo, PMA, or HDE submission for a cyber device. ](/terms/premarket-cybersecurity)[ Cybersecurity Secure Boot A chain-of-trust mechanism that ensures only cryptographically signed firmware and software can run on a device. ](/terms/secure-boot)[ Cybersecurity AAMI TIR57 AAMI Technical Information Report providing MedTech-specific guidance on cybersecurity risk management. ](/terms/aami-tir57)[ Cybersecurity AAMI TIR97(TIR97) AAMI Technical Information Report on post-market security risk management for medical device manufacturers, the operational companion to TIR57. ](/terms/aami-tir97) Cited by Where this term appears across MedTech Terms. Ecosystems (1) - [Connected & Cyber-Physical Devices](/ecosystems/connected-devices) ## Primary references 3 sources Link health: 3 verified · last checked 2026-06-20 NIST· 1 Trusted Computing Group· 1 FDA· 1 1. [1 NIST SP 800-193: Platform Firmware Resiliency Verified NIST · csrc.nist.gov ](https://csrc.nist.gov/publications/detail/sp/800-193/final) 2. [2 TPM 2.0 Library Specification Verified Trusted Computing Group · trustedcomputinggroup.org ](https://trustedcomputinggroup.org/resource/tpm-library-specification/) 3. [3 FDA - Cybersecurity for Medical Devices Verified FDA · fda.gov ](https://www.fda.gov/medical-devices/digital-health-center-excellence/cybersecurity) Inline markers like \[1\] jump to the matching reference above. Sponsor note ### Working on medical device cybersecurity? Blue Goat Cyber specializes in MedTech cybersecurity - threat modeling, SBOMs, penetration testing, and FDA premarket submissions. [Book a 30-minute discovery session](https://go.bluegoatcyber.com/meetings/blue-goat-cyber/discovery-session) - No obligation - Expert-led from minute one - NDA available on request MedTech Terms is a community resource sponsored by [Blue Goat Cyber](https://bluegoatcyber.com). Definitions are independent of any vendor. On this term Category Cybersecurity Acronym HRoT Sources 3 Updated 6/20/2026 [Compare with another term](/compare?a=hardware-root-of-trust) Learn in 60 seconds Card Lesson Quiz A tamper-resistant hardware element (TPM, secure element, or fused boot ROM) that provides the foundational, unforgeable trust anchor for secure boot, attestation, and key storage. - · FDA premarket cybersecurity submissions are expected to describe the device's roots of trust and how cryptographic keys are protected at rest. - · Devices that store keys in flash or in software-only key stores cannot credibly claim the security capabilities FDA expects. Remember this Watch out: Calling a software-only secure key store a 'root of trust', without hardware tamper resistance, it isn't. Related terms - [Secure Boot ](/terms/secure-boot) - [Code Signing ](/terms/code-signing) - [Cryptographic Agility ](/terms/crypto-agility) - [Premarket Cybersecurity Submission ](/terms/premarket-cybersecurity) - [IEC 81001-5-1 ](/terms/iec-81001-5-1) - [AAMI SW96 ](/terms/aami-sw96) You may also need Auto-suggested from Cybersecurity and shared keywords. - [Health Information Sharing and Analysis Center(H-ISAC) ](/terms/h-isac) - [Legacy Device Cybersecurity ](/terms/legacy-device-cyber) - [Patchability ](/terms/patchability) - [SAST and DAST ](/terms/sast-dast) - [Side-Channel Attack ](/terms/side-channel) - [SOC 2 ](/terms/soc-2) [All Cybersecurity terms](/terms?cat=Cybersecurity) From the Blue Goat network Related resources and services on this topic. - [ MedTech Cybersecurity Standards Authoritative reference for the standards and guidances behind medical device cybersecurity. ](https://medtechcyberstandards.com) - [ MedTech Cyber Tips Practical, organized tips for medical device cybersecurity teams. ](https://medtechcybertips.com) - [ MedTech Cybersecurity Crosswalk International crosswalk of medical device cybersecurity requirements across regulators. ](https://mdccrosswalk.com) - [ Code Blue Real medical device cybersecurity incidents and their lessons. ](https://codebluechart.com) MedTech Terms An authoritative, plain-language reference for the regulatory, quality, cybersecurity, and software terms that shape modern medical devices. 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