Secure File Sharing with End-to-End Encryption - dropshare
Share files securely with zero-knowledge encryption. Client-side AES-256-GCM encryption ensures your files stay private. Free, anonymous, and developer-friendly.
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# dropsha.re - Zero-Knowledge File Sharing Platform
## Overview
dropsha.re is a free, open-source file sharing service that prioritizes privacy and security through zero-knowledge encryption.
Built by Magic Monad, it enables users to share files securely without requiring registration or compromising privacy.
## Core Features
- **Zero-Knowledge Architecture**: Files are encrypted client-side before upload; servers never see plaintext content
- **AES-256-GCM Encryption**: Military-grade encryption with randomly generated 256-bit keys
- **Client-Side Processing**: All encryption/decryption happens in the browser using Web Crypto API
- **No Registration Required**: Anonymous file sharing with no personal information collected
- **Automatic Deletion**: Files automatically deleted after 7 days
- **No Data Collection**: No cookies, tracking, analytics, or personal data storage
- **Cross-Platform**: Works on any modern browser with JavaScript enabled
## Technical Architecture
- **Frontend**: Astro.js with React components, TypeScript, Tailwind CSS
- **Encryption**: AES-256-GCM with 256-bit keys generated via Web Crypto API
- **Storage**: Cloudflare R2 object storage for encrypted files
- **Deployment**: Cloudflare Pages with serverless functions
- **Security**: HTTPS/TLS for all traffic, URL fragments for key sharing
## File Specifications
- **Maximum Size**: 1GB per file
- **Retention Period**: 7 days automatic deletion
- **Supported Types**: Any file type (no restrictions)
- **Upload Limit**: One file at a time
- **Share Links**: Unique encrypted URLs with decryption keys in URL fragments
## Encryption Process
1. File selected in browser
2. 256-bit AES-GCM key generated locally using Web Crypto API
3. File encrypted client-side with randomly generated 12-byte IV
4. Encrypted data uploaded to Cloudflare R2
5. Share URL created with decryption key embedded in URL fragment (#)
6. Key never transmitted to servers
## Privacy Guarantees
- **True Zero-Knowledge**: Servers