meta_id 3355890

On July 27, 2026, the Federal Office for Information Technology (BSI) published version 4.0 of Technical Guideline TR-03174 (Secure Applications in Financial Services), a comprehensive revision of its three-part technical guidance document. The updated guideline supports the development and testing of mobile applications, web applications, and associated backend systems in the financial sector. These include digital household and cash management tools, tax and financial calculators, credit calculators, and payment-enabled applications from retailers. The TR-03174 addresses a diverse, non-regulated audience of developers and service providers, offering a compact overview of technical information security measures applicable to financial applications. The revision reflects ongoing changes in the financial sector and evolving regulatory requirements. A significant enhancement in version 4.0 is the inclusion of a practical work table (Annex B), which supports software planning, implementation, and testing phases. This new tool provides practitioners with a structured approach to applying the guideline's security recommendations across all three document parts: mobile applications, web applications, and backend systems. The BSI has made all three parts of TR-03174 available for download, along with corresponding Annex B work tables in spreadsheet format. These resources are designed to enhance the practical applicability of the guidance for developers and organisations implementing secure financial applications. The revision ensures the guideline remains aligned with current industry practices and regulatory expectations in the financial services sector. **References:** BSI Press Release, July 27, 2026: https://www.bsi.bund.de/DE/Presse/Pressemitteilungen/Presse2026/TR-03174_ueberarbeitet_270726.html