Didit Biometric Authentication is a biometric re-authentication solution designed to verify returning users without requiring document submission. The product performs real-time liveness detection to confirm physical presence and can optionally match the live capture against a stored portrait from previous KYC processes or a reference image provided via API. The solution offers three liveness detection methods with varying security levels: Passive Liveness (1 second, single frame verification), 3D Flash (5 seconds, uses dynamic colored lights to analyze skin reflection), and Action & 3D Flash (8 seconds, prompts random user movements). Authentication typically completes in under 10 seconds. The system runs fraud checks including IP analysis, device and network intelligence, duplicate detection, and blocklist matching. It can be deployed via API integration or no-code hosted links with webhook support. The platform maintains cross-session identity management by linking biometric profiles across sessions. Use cases include protecting critical actions such as password changes, high-value withdrawals, digital document signing, account recovery, step-up verification, and continuous trust checks. The solution can function independently or alongside existing KYC processes. Didit holds ISO 27001, ISO 27017, ISO 27018 certifications and iBeta Level 1 certification for liveness detection under ISO 30107-3 standards. The platform is GDPR compliant and offers white-label capabilities.