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🚀 Qopy Features - Military-Grade Secure Text Sharing Redefined

Qopy is not just another text sharing service. It's a privacy-first, security-focused platform with military-grade encryption that puts your data protection above everything else. Here's what makes Qopy the ultimate choice for secure text sharing.

🔒 Advanced Security Features

Military-Grade Encryption Features

Qopy implements cutting-edge encryption techniques for maximum security:

• AES-256-GCM encryption - Military-grade algorithm used by governments worldwide
• PBKDF2 key derivation - 100,000 iterations for password-protected content
• Hybrid security system - URL secrets + passwords for defense in depth
• Deterministic IV derivation - IV derived from combined secret for password-protected clips
• Binary storage - Direct byte concatenation, stored as BYTEA for efficiency
• Random key generation - Cryptographically secure random keys for non-password clips
• Authenticated encryption - GCM mode provides both confidentiality and integrity
• Zero-knowledge architecture - We literally cannot read your content

Hybrid Security Architecture

Qopy's innovative hybrid security combines multiple protection layers:

• URL secrets - 16-character random secrets automatically generated and included in share URLs
• User passwords - Traditional password protection chosen by users
• Combined secrets - Both secrets combined for maximum security (URL_secret:password)
• Defense in depth - Even weak passwords are protected by the URL secret
• URL-based access control - Only those with the complete URL can attempt decryption
• Two-factor security - Something you know (password) + something you have (URL)

Zero-Knowledge Architecture

True privacy protection with zero-knowledge guarantees:

• We never see your plain text content
• All encryption happens in your browser
• Only encrypted data is stored on our servers
• Passwords never leave your browser
• URL secrets never leave your browser
• Even if our servers were compromised, your data would remain secure
• No IV transmission - derived deterministically from combined secret

Rate Limiting & Abuse Prevention

Our multi-layered rate limiting system prevents abuse while ensuring fair usage:

• Burst protection against rapid-fire attacks
• General API protection for overall stability
• Content-specific limits to prevent spam
• IP-based enforcement with temporary processing

API Security Limitations

Important: Client-side encryption is only available through the web interface. When using the API directly:

• Content is sent as plaintext to the server
• Server-side encryption is applied
• For maximum security, always use the web interface

📊 How Qopy Compares to Alternatives

🎯 Use Cases

For Developers

• Share code snippets securely with team members
• Quick debugging assistance without exposing sensitive data
• API integration for automated workflows
• Secure sharing of configuration files

For Business

• Share sensitive documents with clients
• Secure communication of passwords or credentials
• Temporary sharing of confidential information
• Compliance with data protection regulations

For Personal Use

• Share notes with family members
• Secure storage of temporary information
• Privacy-focused communication
• Mobile-friendly sharing with QR codes