SM-SR

Provisionnement
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Subscription 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. It is also written Subscription Manager Secure Routing. The term belongs to the Provisionnement section of the smart card glossary.

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    Also known as:
    
    Subscription Manager Secure Routing
    
  

  





  
  

    
    




    
    
    

      
SM-SR (Subscription Manager - Secure Routing)


SIM chip." data-category="Application">eSIM profile management." data-category="Provisioning">SM-SR 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 RSP architecture (SGP.22) eliminated SM-SR in favor of direct SM-DP+-to-eUICC 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:


    

  1. Operator orders profile from SM-DP
    2. 

  2. SM-DP prepares and encrypts the profile package
    3. 

  3. SM-DP transfers the encrypted profile to SM-SR
    4. 

  4. SM-SR establishes a secure channel to the target eUICC (via OTA or HTTPS)
    5. 

  5. SM-SR installs the profile into an ISD-P on the eUICC
    6. 

  6. SM-SR confirms installation to SM-DP and operator
    7. 



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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Frequently Asked Questions


  

    
    

      
        
What is the smart card glossary and who is it for?

        
      
      

        
The smart card glossary is a comprehensive reference of technical terms, acronyms, and concepts used in smart card technology. It covers protocols (APDU, T=0, T=1), security (Common Criteria, EAL, HSM), hardware (SE, EEPROM, contact pad), and applications (EMV, ePassport, eSIM). It serves developers, product managers, and engineers.

      

    

    
    

      
        
Are the glossary definitions available in other languages?

        
      
      

        
Yes. SmartCardFYI provides glossary definitions in 15 languages including English, Korean, Japanese, Chinese, Spanish, Portuguese, Hindi, Arabic, French, Russian, German, Turkish, Vietnamese, Indonesian, and Thai.