ENISA just published Embedded Sim Ecosystem, Security Risks and Measures.
eSIM is the generic term used for the embedded form of a SIM (subscriber identity module) card. Built into the device, the eSIM is hosted on a tiny chip that provide storage for the mobile subscription details in digital format. Like the regular SIM card, the eSIM identifies a subscriber within a mobile operator's network and can be found in a wide range of products, such as wearable devices, computers, medical internet-of-things (IoT) devices, home automation and security systems, and handheld point-of-sale devices. This report gives an overview of the eSIM technology, assesses the market potential in Europe and includes security challenges identified and proposed mitigation measures.