Zero-Knowledge Encrypted Messaging: The Whatshush Privacy Web App
Client-side AES-256-GCM encryption with self-destructing secret notes.
1. The Engineering Challenge
Sharing sensitive API keys, passwords, and tokens via standard chat apps creates security vulnerabilities. Whatshush needed a simple web app where messages self-destruct after being read once.
2. Architectural Solution
We engineered Whatshush using client-side Web Crypto API. Encryption keys never leave the browser hash fragment, ensuring even the hosting server cannot read the payload.
Key Technical Architecture Highlights
- Client-side AES-256-GCM encryption and decryption
- Zero-knowledge backend storage storing only encrypted ciphertext blobs
- Atomic read-and-delete database operations
3. Business Impact & Results
Whatshush provides developers and privacy-conscious teams with a safe way to exchange confidential credentials without creating permanent logs.
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