Software-only security has a weak foundation if the device cannot protect keys or prove what firmware is running. This is an English DEV.to draft based on a Silicon LogiX technical article. The canonical source is linked at the end. Why it matters Connected products increasingly need a hardware-backed trust anchor for identity, updates and data protection. TPMs, TrustZone and secure enclaves solve related problems, but they are not the same tool. Architecture notes A TPM is useful for key storage, attestation and measured boot in Linux-class systems. ARM TrustZone separates secure and non-secure worlds, enabling protected services on compatible MCUs and SoCs. Secure enclaves or security elements can isolate credentials and cryptographic operations from the main application. The firmware architecture must define which assets are protected and who is allowed to access them. Practical checklist [ ] Identify secrets: device identity, TLS keys, update keys, user data and calibration data.…