Handwriting Simulation: Integrate handwriting font libraries from Google Fonts (e.g., Dancing Script, Pacifico) to generate realistic text-based signatures.
SVG Stroke Animation: Implement an "auto-writing" visual effect by manipulating the stroke-dashoffset property, making the signature appear to be drawn in real-time as the certificate loads.
2. Signature Management Backend
Transparency Processing: Automatically remove white or solid backgrounds from uploaded signature images to create clean, transparent assets.
Digital Seal Composition: Support layering a "Red Official Seal" (at ~50% opacity) over the signature to simulate a physically stamped and signed document.
3. Security & Verification
Anti-Counterfeiting: Embed subtle, invisible digital watermarks within the signature images to trace unauthorized use or distribution.
Access Control (RBAC): Ensure the certificate generation API can only access specific high-level signature assets (e.g., CEO's signature) after multi-factor or admin-level authentication.
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