Trusted Connectivity Alliance Releases New eSIM Interoperability Guidance for Java Card Applet Developers

Trusted Connectivity Alliance (TCA) has published new guidance to enable Java Card applet developers to maximise interoperability and security across eSIM deployments.

‘Stepping Stones for Java Card Applet Developers’ is the latest release in TCA’s acclaimed ‘Stepping Stones’ series, which provides recommendations and guidelines to support the development and deployment of SIM-based technologies.

TCA’s new guidance addresses emerging interoperability considerations presented by the growing adoption of eSIM technology. It provides an analysis of key recent Java Card technology updates, along with the impact of broader ecosystem developments from 3GPP, ETSI and GSMA. A series of best practices and security recommendations are also detailed to maximise interoperability and ensure applet assets are sufficiently protected. For developers seeking practical guidance, recommendations are collated into a comprehensive ‘interoperability checklist’ to help address common challenges and deliver high-quality applets.

Amedeo Veneroso, Chair of the TCA Interoperability Working Group, comments: “To ensure seamless integration and simplify eSIM deployments across the highly complex mobile ecosystem, it is imperative that applets are compatible and secure. By addressing the unique considerations presented by Java Card technology, TCA’s latest guidance will support developers – particularly those who are new to the eSIM market – in delivering robust and interoperable solutions that enable the delivery of powerful eSIM-based value-added services.”

Bertrand Moussel, Chair of the TCA Board, adds: “TCA’s various Stepping Stones documents have played an important role in guiding industry stakeholders as part of our decades-long commitment to identifying and promoting the need for strong interoperability. This latest guidance from TCA marks another important milestone in our mission to promote trust and simplicity across the secure connectivity ecosystem.”

Other key interoperability initiatives from TCA include the release of the new, free-to-use TCALoader tool, which enables mobile operators and application developers to download, install and manage applications on the UICC / eUICC to test interoperability across different deployments.

TCA has also reported growing industry momentum for its eSIM Interoperability Testing Service – delivered by COMPRION. The service enables mobile operators, mobile virtual network operators (MVNOs), IoT connectivity providers and eSIM profile developers to test how eSIM profiles interact with an extensive range of consumer eSIM devices such as smartphones, wearables, tablets and laptops. This helps to proactively identify and address individual interoperability issues prior to deployment.

‘Stepping Stones for Java Card Applet Developers’ is available to download here. For further information on the eSIM Interoperability Service and TCALoader, contact and visit the TCA and COMPRION websites.

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For further TCA media information, please contact Yash Raveendra – Tel: +44(0)113 3501922 or email:

About Trusted Connectivity Alliance

Trusted Connectivity Alliance (TCA) is a global industry association working to enable trust in a connected future.

The organisation evolved from the SIMalliance, reflecting the continued expansion of the global SIM industry and the need for broader collaboration. Its members are leading providers of secure connectivity solutions for consumer, IoT and M2M devices. This spans Tamper Resistant Element (TRE) technologies including SIM, eSIM, integrated SIM, embedded Secure Element (eSE) and integrated Secure Element (iSE), as well as hardware and software provisioning and other personalisation services.

TCA members are: Card Centric, COMPRION, Eastcompeace, Giesecke+Devrient, IDEMIA, Kigen, Linxens, Monty Mobile, NXP Semiconductors, Oasis Smart SIM, STMicroelectronics, Thales, Valid, Workz Group, Wuhan Tianyu and XH Smart Card. | News | Blog | X | LinkedIn | YouTube