StampLock

StampLock is a mobile app that adds watermarks to your images, allowing only authorized people to restore the original using an unlock code.

Solve the problem of unauthorized AI manipulation and image theft on social media. Keep control of your original images while sharing only with those you trust.

【Key Features】
• Easy watermark creation with intuitive controls
• Customizable watermarks (preset/custom text, size, opacity, angle, color, placement, margin)
• Blur/mosaic effects with adjustable intensity
• Direct sharing to social media
• Library management (save, share, delete your creations)
• QR code/Short ID generation for quick access to unlock pages
• Unlock code system for secure, limited sharing with signed URLs

【Who Is This For?】
Creators, photographers, idols, cosplayers, models, merchandise managers, and anyone who wants to protect their images.

【How to Use】
Without unlock code:
1. Select an image from your photo library
2. Customize watermark settings
3. Create stamped image
4. Share on social media
5. Manage in your library

With unlock code:
1. Select an image from your photo library
2. Customize watermark settings
3. Set unlock code (optionally add QR code)
4. Create stamped image
5. Share on social media
6. Share unlock code with trusted recipients
(Recipients)
7. Scan QR code for quick access
8. Enter unlock code
9. Restore original image

【Security】
• Unlock codes hashed with SHA-256
• Rate limiting prevents brute force attacks
• Signed URLs for secure image distribution

Protect your copyrights and share images safely on social media.