How This Briefing Works
This dossier opens with key findings, then maps the gap between what 51degrees discloses and what BLACKOUT observed at runtime. From there: what it means for your organization, what to do about it, and the detection evidence underneath. BLACKOUT observes runtime browser behavior and cites the regulations that address each pattern — legal determinations are your counsel's call.
At a Glance
across 1 sites
vendor fires before consent
Briefing
51degrees specializes in device detection and user-agent parsing. Deploys persistent identifiers without consent mechanisms and maintains cross-session tracking databases. Primary risks: GDPR Article 9 violations (device fingerprinting as special category data processing) and ePrivacy Directive non-compliance (pre-consent storage).
What This Means For You
For security teams: Device fingerprinting creates false positives in fraud detection (legitimate users flagged as suspicious based on device characteristics). For legal: Every fingerprinted device is a potential GDPR data subject access request requiring forensic reconstruction. For marketing: Device data subsidizes competitors' audience targeting at your visitor acquisition cost.
Risk Channel Breakdown
Distorts attribution data
51degrees device fingerprints feed competitive intelligence platforms. Every identified device becomes a tradeable signal - your site visitors become commoditized data points sold to competitors running parallel campaigns.
Expands attack surface
Persistent device tracking without explicit consent creates GDPR Article 6 violations. Device fingerprints constitute personal data under CJEU case law. Regulators treat persistent identifiers as high-risk processing requiring documented legal basis and impact assessments.
Threat Indicators
Runtime-observed (BTI-C)
Ignoring CMP signals
Long-lived identifiers
PII deanonymization
Per-code narrative explanations of what each detected behavior means for your organization
Per-code evidence with full attribution chain, severity rankings, and consequence narratives See pricing →
Claims vs. Reality
BLACKOUT analyzed 51degrees's public claims against observed runtime behavior and identified 1 contradiction.
Full claim-vs-reality gap analysis with claim text, observed behavior, severity, regulatory citations (GDPR, CCPA, ePrivacy), and evidence pointers per gap See pricing →
What To Do
3 for current users · 3 for evaluators
contractual leverage points
Role-specific actions (security / legal / marketing / procurement), full negotiation brief with contractual language, and BTI-code-specific consequences See pricing →
Supply Chain & Pairings
Full supply-chain mapping (loads / loaded-by lists with vendor identities) and the undisclosed-subprocessor list with observation evidence See pricing →