eUICC

eUICC (embedded UICC[1]) refers to the architectural standards published by the GSM Association (GSMA)[2][3] or implementations of those standard for eSIM, a device used to securely store one or more SIM card profiles, which are the unique identifiers and cryptographic keys used by cellular network service providers to uniquely identify and securely connect to mobile network devices. Applications of eUICC are found in mobile network devices (cell phones, tablets, portable computers, security controllers, medical devices, etc.) that use GSM cellular network eSIM technology.

Standards

The core standards that define eUICC are published by the GSM Association in two topical areas.

Consumer and IOT

Core standards for implementing eSIM on mobile devices include the following articles:[2]

Machine to Machine (M2M)

GSMA publishes standards for machine-to-machine (M2M) third-party provisioning of eSIM which includes the following articles:[3]

Implementation

eUICC can refer to any implementation or application of the eUICC standards in an eSIM device. Each implementation of eUICC includes software code, a processor to emulate the software, non-volatile memory used to store the unique identifiers and cryptographic keys that are part of a SIM profile, and a bus interface to communicate the SIM profile to the mobile device. eUICC standards specify that only one eUICC security controller (ECASD) may be implemented in an eSIM, but the eSIM may store multiple SIM profiles.[5]

EID

GSMA standards define EID as "eUICC Identifier".[4][6] Some developers / implementers have referred to this using the descriptive term "eSIM identifier", which summarizes the function of an eUICC Identifier.[7][8] Some third parties have joined this acronym with the term "electronic identity document", which is a general concept of any identifier stored or presented in electronic format.[9][10]

References
  1. Weber, Tobias. "What is an eUICC and Why Does It Matter?". EMnify. EMnify. Retrieved 17 September 2022.
  2. "eSIM Consumer and IoT Specifications". gsma.com. GSM Association. Retrieved 14 September 2022.
  3. "M2M Specifications". gsma.com. GSM Association. Retrieved 14 September 2022.
  4. "SGP.21 eSIM Architecture Specification". GSM Association. 3 Aug 2021.
  5. "RSP Technical Specification Version 2.4" (PDF). gsma.com. GSM Association. 28 October 2021.
  6. "SGP.29 v1.0 EID Definition and Assignment Process". GSM Association. 31 Jul 2020.
  7. "Electronic subscriber identity module application identifier handling". Google Patents. Retrieved 16 September 2022.
  8. "United States Patent Application Publication US20150350879A1" (PDF). Google patents. United States Patent and Trademark Office. 3 December 2015.
  9. Sheridan, Anatoliy (18 August 2022). "What is an EID number in a phone?". Tab-TV.
  10. Sereda, Vladimir (22 November 2021). "What is a phone EID number explained". Splaitor.
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