Device Fingerprinting

Device Fingerprinting — идентификация устройства через сбор десятков характеристик браузера и системы.

Атрибуты

User-Agent, платформа. Screen resolution. Timezone, language. Fonts, plugins. WebGL renderer. Canvas fingerprint. AudioContext. Hardware: CPU, RAM. WebRTC IP leak. Combined uniqueness 95%+.

Технологии

FingerprintJS (open-source + Pro). Iovation (TransUnion). ThreatMetrix (LexisNexis). Sift Science. Kaspersky Fraud Prevention. Собственные обычно слабее из-за отсутствия global data.

Fraud prevention

Multi-accounting detection. Bot identification. Account takeover: mismatch device. Stolen card: device не associated с card. Blacklisted devices tracked. Combined с behavioral анализом.

Privacy

GDPR: legitimate interest applied для fraud prevention. Transparent disclosure в privacy policy. Anti-fingerprinting browsers (Firefox, Brave). Persistent storage через LocalStorage, IndexedDB, Service Workers.