The Porosity of Local Databases: The Meta Case
Recently, security researchers highlighted a major design vulnerability within the iOS and macOS ecosystems. According to reports from the media outlet Clubic, the WhatsApp messaging application stores its chat databases unencrypted in a shared space, making them technically accessible to other applications from parent company Meta, such as Facebook and Instagram, when installed on the same device. This situation, which is now the subject of a class action lawsuit led by the law firm Quinn Emanuel, raises fundamental questions about the actual isolation of applications within mobile operating systems that are widely considered closed and secure.
For both the general public and organizations, the promise of application isolation, commonly known as sandboxing, is a pillar of digital trust. Knowing that highly confidential data, such as professional or personal exchanges, can be read behind the scenes by other applications without any explicit permission requested from the user shakes this trust. This case illustrates the difference between perimeter security, which aims to keep external attackers out, and internal security, which must manage data porosity between applications from the same developer.
The Technical Mechanisms of Application Porosity
To understand how such a situation is possible, one must analyze how isolation works on modern operating systems. Sandboxing is a security technique that isolates each application within its own execution and storage space. In theory, Application A cannot read files from Application B. However, to improve the user experience, for example, to quickly share an image or maintain a logged-in session across multiple applications from the same developer, operating systems have introduced sharing mechanisms called "App Groups."
These App Groups create a shared directory on the device's hard drive. Applications from the same developer that share the same group identifier can read and write to it freely. If the data stored in this shared space is not encrypted end-to-end by the application itself, it becomes readable by any other authorized process within that group. According to technical security analyses, this is precisely the mechanism that allows Facebook or Instagram to access WhatsApp's SQLite databases on the same device. Technical convenience has triumphed over strict privacy, turning a convenient space into an opaque black box for the user.
Absolute Transparency as an Architecture of Trust
In the face of this systemic opacity, the Quebec-based platform ProductivIA offers a diametrically opposed approach, built on total transparency and user control. Within the ProductivIA virtual ecosystem, which runs directly in the browser, the concept of an application black box is eliminated by design. All data generated or used by applications is stored in an explicit, structured manner in a single directory named /data/.
Thanks to the Nuage application, users have direct, visual, and permanent access to all of their files. Whether dealing with work documents, configurations, or interaction histories with the Assistant, nothing is hidden in secret databases or inaccessible system directories. This architecture guarantees data portability, in full compliance with the requirements of Quebec's Law 25 regarding the protection of personal information. Users can view, download, or delete their data at any time, without depending on the goodwill of a third-party developer.
Furthermore, orchestration between applications does not rely on hidden background file sharing. When one application needs to interact with another, for example, when the Assistant requests a document to draft an email, it uses the standardized assistant_services protocol. Every exchange is explicit, tracked, and subject to user control. There are no hidden communication channels allowing one application to harvest another's data without the user's knowledge.
Toward an Auditable and Sovereign Digital Model
The discovery of this invisible data sharing serves as a reminder that security cannot rely solely on the promises of tech giants. It must be verifiable. This is the core focus of the Quebec sovereign stack. While ProductivIA ensures transparency at the application level in the browser, this approach can be reinforced at the hardware level by adopting Boréal-OS, a native, sovereign, and verifiable operating system free of commercial telemetry. For organizations requiring absolute confidentiality for their data processing, the Matania artificial intelligence engine allows queries to be processed locally in Quebec, avoiding any opaque cross-border transit.
The transition toward transparent and auditable architectures is no longer just a technical preference; it is a governance requirement for institutions and businesses concerned about their digital sovereignty.