a-Trust (AT) (at.atrust.tanapp): Privacy & Security Findings

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Permanent Disclosure Ledger

The discipline, demonstrated

On behalf of our research partners, we investigate publicly distributed Android and iOS apps: we decompile them, follow their code and data flows, and trace every connection to the servers it reaches. Hundreds of agents work through each app and join the technical evidence into one picture, which our specialists then review and verify.

387+
Android/iOS apps audited
Every app is decompiled at source-code level, not just scanned from outside.
1.04M+
Smali classes read
The full shipped code we have actually read, not an estimate.
262+
Critical findings recorded
Confirmed findings copied to regulators, not theoretical risks.
970+
Weak points found
Third-party tracking we have provably found inside the binary.
567+
Endpoints investigated
Real servers and countries where data actually flows.
132+
SDK instances mapped
Reusable libraries correlated across the entire corpus.
1 of 387 entries · sorted by elapsed ↓
Showing the report for a-Trust (AT).
OrganisationNotifiedStatusSevIntel (click to expand)StatutesResolvedDisclosureElapsedReport
a-Trust (AT)
Private
2026-06-19
91d ago
Substantive
High
a-Trust is Austria's officially recognized provider for legally binding electronic signatures, but its root-device check can be tricked, letting an attacker silently swap the document you think you're signing for a different one, and the company has confirmed this.
RootBeer root-detection bypass lets an attacker on a rooted device intercept a PIN/biometric and swap the signing request before it reaches the remote QSCD, so the user signs one document while the server signs another, an eIDAS Art. 26 sole-control violation. No certificate pinning. Signature audit logs are written in plaintext. The company confirmed the finding.
click to expand
eIDAS Regulation Art. 24(2)(b)ETSI EN 319 401eIDAS Regulation+3
Yes
Closed
Disclosure
91d 00h 00m 00s
Published
PDF

This ledger is updated in real time as companies respond. Silence is public. Severity is scored primarily by CVSS v4.0, we reserve the right to deviate based on blast radius.