How To
How to Send Files Securely Online?
Quick Answer
Use zkChat's encrypted file drop — files are encrypted in your browser with AES-256-GCM before upload. The server never sees the unencrypted file.
Detailed Explanation
Most file sharing services (Google Drive, Dropbox, email attachments) can access your files because encryption happens on their servers, not yours. For truly secure file sharing, you need client-side encryption. zkChat's file drop encrypts files directly in your browser using AES-256-GCM before they're transmitted. The encryption key stays in the URL fragment (never sent to the server). Recipients decrypt the file in their browser. The file auto-expires after the session. No account needed — just go to zkchat.org/file, upload, and share the link.
Related Questions
How to Send a Password Securely?
Never send passwords over email or regular chat. Use zkChat's One-Time Message feature — the password is encrypted, and the link self-destructs after one view.
How Does End-to-End Encryption Work?
Your device encrypts the message before sending it. Only the recipient's device can decrypt it. The server in between only sees scrambled data it cannot read.
What Is Zero-Knowledge Encryption?
Zero-knowledge encryption means the service provider is technically unable to access your data — not just promising not to, but cryptographically prevented from doing so.
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