IDZ says Cure53 completed 21-day security review of its apps and cryptography
IDZ said Cure53 carried out a 21-day white-box security assessment in September 2025 covering seven work packages across its cryptography, apps and backend systems.
IDZ said on Aug. 6, 2026, that Cure53 completed an independent security assessment of its cryptographic libraries, mobile and web applications, key-management architecture and backend APIs.
The company said the assessment was commissioned in July 2025 and carried out in September 2025. It said the work lasted 21 days and was divided into seven work packages.
Those work packages covered IDZ's key derivation architecture, Dart and C++ cryptographic libraries, backend key management, iOS and Android apps, Flutter web apps and backend APIs.
IDZ described Cure53 as a Berlin-based security firm and said the review was conducted as an independent white-box source code audit and penetration test. The release said the engagement reviewed parts of the stack tied to encrypted storage, private communication and user-controlled cryptography.
Joseph Bara, IDZ's founder and CEO, said independent assessments are important for earning trust. He said security is not a one-time milestone and that the company will keep investing in external review, internal hardening and transparent communication as the platform evolves.
The release also says IDZ combines MetaCortex, described as private AI for encrypted files and chats, with ZCloud for encrypted storage and ZChat for private messaging. It says a Cure53 management summary is available as a PDF.
IDZ says it will continue with external review and internal hardening, and it points readers to the Cure53 summary PDF for more detail.
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Editorial note: This article was prepared with AI assistance and includes source attribution for reader review.
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