Cryptographic Key Custody across Factory Provisioning and Staging Deployment
Cryptographic key custody requires FIPS 140-3 HSM injection, credit-metered factory proxies, and strict scrap certificate revocation.
Enrollment over Secure Transport
Meaning
Cryptographic key management standards define automated client-server protocols for requesting and issuing X.509 digital certificates over secure transport layer channels. Embedded cellular modems and industrial gateways implement enrollment over secure transport to acquire operational identity certificates from enterprise public key infrastructure servers. The protocol uses HTTPS transport to distribute client certificates and retrieve certificate authority certificates directly to connected edge hardware.
Its scope ends after credential delivery, leaving ongoing session management to higher-level application layers.
Certificate Request
Automated credential enrollment relies on cryptographic proof of possession during certificate signing requests. An edge device running enrollment over secure transport packages its public key and identity parameters into a standard request structure signed by its internal factory key. Server nodes validate this signature against trusted manufacturing roots before granting an operational certificate.
Network Provisioning
Factory assembly lines pre-load initial trust anchors to enable secure server discovery during field power-on sequences. Devices initiate enrollment over secure transport client requests over local network interfaces, establishing mutual transport layer security authentication before requesting client certificates.
Bootstrap Handover
System acceptance tests document automated credential retrieval during field commissioning. Upon first boot, device firmware queries the enrollment over secure transport endpoint, parses the returned certificate bundle and writes operational credentials into protected flash memory. Network interface controllers verify new certificate signatures before enabling secure cloud telemetry streams.