How It Works
Five steps to bulletproof document sharing
From upload to audit trail, every step is designed to protect your confidential information and give you complete control over who sees what, when.
Upload & Encrypt
Your document never leaves your browser unencrypted
- Client-side AES-256-GCM encryption before upload
- Encryption key stored in URL fragment (never sent to server)
- Supports PDFs, presentations, financials up to 50MB
- Zero-knowledge architecture - we can't read your documents
Configure Access
Set rules that match your security requirements
- Choose from standard or custom NDA templates
- Set expiry by time, view count, or first view
- Enable forensic watermarks with recipient info
- Disable downloads, printing, and screenshots
Share Secure Link
Recipients sign NDA before viewing - no account needed
- One-click e-signature with legal name and email
- IP address, device fingerprint, and timestamp logged
- Document unlocks only after NDA acceptance
- Magic link sent to email for identity verification
Monitor Activity
Real-time visibility into document engagement
- Page-by-page view tracking with timestamps
- Time spent on each page and section
- Real-time alerts via email, Slack, or webhook
- Suspicious activity detection and alerts
Revoke & Export
Maintain control even after sharing
- Instant access revocation at any time
- Court-admissible audit trail exports
- PDF or CSV format for legal proceedings
- Immutable activity log with cryptographic proof
Why traditional sharing fails
| Sharing Method | Shadowbox | Traditional | Risk |
|---|---|---|---|
| Email attachment | ✕ | No control after sending | |
| Cloud storage link | ✕ | Can be forwarded endlessly | |
| NDA before viewing | ✕ | Documents viewed without agreement | |
| View tracking | ✕ | No visibility into access | |
| Watermarking | ✕ | Screenshots shared anonymously | |
| Instant revocation | ✕ | Can't stop distribution | |
| Audit trail | ✕ | No proof for legal action | |
| Expiry controls | ✕ | Links live forever |
Enterprise-grade security
Zero-Knowledge Encryption
Your documents are encrypted in your browser. We never have access to the decryption keys.
SOC 2 Type II Compliant
Annual audits ensure our security controls meet the highest industry standards.
GDPR & CCPA Ready
Full compliance with data privacy regulations. Delete data on demand.
Penetration Tested
Regular third-party security assessments to identify and fix vulnerabilities.
Technical Architecture
Client-Side
- • AES-256-GCM encryption
- • Key derivation with PBKDF2
- • WebCrypto API
- • React + Next.js
Server-Side
- • Zero-knowledge storage
- • PostgreSQL + Redis
- • Node.js API
- • AWS S3 encrypted storage
Compliance
- • SOC 2 Type II
- • GDPR compliant
- • HIPAA ready
- • ISO 27001 aligned
Note: We use a zero-knowledge architecture. Your encryption keys never touch our servers. Even we can't read your documents.
Ready to secure your documents?
Join thousands of teams who've stopped document leaks with Shadowbox. Set up takes less than 2 minutes.
No credit card required • 14-day free trial • Cancel anytime