SM-SR
ProvisioningSubscription Manager - Secure Routing is the network entity in the M2M RSP architecture that manages the secure communication channel between SM-DP and eUICC. SM-SR handles profile lifecycle operations (enable, disable, delete) and maintains the inventory of eUICC capabilities and installed profiles.
SM-SR (Subscription Manager - Secure Routing)
SM-SRSM-SRProvisioningSecure routing entity for M2M eSIMeSIMApplicationProgrammable embedded SIMSIMApplicationSmart card for mobile network authentication.Click to view → chip.Click to view → profile management.Click to view → is the network entity in the GSMA M2M RSP architecture (SGP.02) that manages secure communication channels between the SM-DP and eUICC devices. While the consumer RSPRSPApplicationOver-the-air SIM profile management.Click to view → architecture (SGP.22) eliminated SM-SR in favor of direct SM-DP+-to-eUICCeUICCProvisioningReprogrammable SIM chip supporting remote profile switching.Click to view → communication, SM-SR remains essential for IoT and machine-to-machine deployments where devices lack user interfaces.
Role in M2M Provisioning
In the M2M architecture, SM-SR serves as a trusted intermediary:
- Secure channel management — Establishes and maintains SCP80/SCP81 secure channels to each eUICC in its inventory
- Profile lifecycle — Executes enable, disable, and delete operations on installed profiles at the operator's request
- Inventory management — Tracks eUICC capabilities, installed profiles, and available memory across device fleets
- Platform management — Handles eUICC firmware updates and GlobalPlatform registry operations
Communication Flow
The M2M profile delivery path differs significantly from consumer RSP:
- Operator orders profile from SM-DP
- SM-DP prepares and encrypts the profile package
- SM-DP transfers the encrypted profile to SM-SR
- SM-SR establishes a secure channel to the target eUICC (via OTAOTAPersonalizationRemote card management via mobile network.Click to view → or HTTPS)
- SM-SR installs the profile into an ISD-P on the eUICC
- SM-SR confirms installation to SM-DP and operator
SM-SR vs SM-DP+
| Aspect | SM-SR (M2M) | SM-DP+ (Consumer) |
|---|---|---|
| User interaction | None (fully automated) | User consent required |
| Device connectivity | OTA/SMS push or HTTPS pull | HTTPS via LPA |
| Concurrent management | Fleet-wide batch operations | Individual device |
| Profile control | Operator retains full control | User controls enable/disable |
SM-SR is particularly important for automotive and industrial IoT where M2M provisioning must occur without human intervention. Leading SM-SR providers (Thales, G+D, Idemia) typically bundle SM-SR and SM-DP services for integrated fleet management.
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