About CipherOnce
Our mission is to make sharing sensitive information simple, secure, and private.
The Problem We Solve
In our digital lives, we constantly need to share sensitive information: passwords for a shared account, API keys for a project, or confidential notes.
Too often, we send this data through insecure channels like email, Slack, or text messages. This leaves a plain-text copy of the secret on servers, in chat logs, and in inboxes, making it vulnerable to data breaches, unauthorized access, and accidental exposure for years to come.
Sending a password in a chat is like sending a postcard with your house key taped to it. It might get there, but you have no idea who sees it along the way.
Our Solution: A New Standard of Security
End-to-End Encryption
Your secret is encrypted and decrypted directly in your browser. The raw, unencrypted data never leaves your device.
Zero-Knowledge Server
The encryption key is part of the URL fragment (#), which is never sent to our servers. We only store encrypted gibberish and have no ability to decrypt your data.
Self-Destructing Links
Secrets are automatically and permanently deleted from our servers after they are viewed or when their expiration time is reached. Burn after reading, by design.
Why We Built This
We believe privacy is a fundamental right. In an era of constant data collection and surveillance, individuals and teams need simple tools to protect their sensitive information without sacrificing convenience.
CipherOnce was created to be that tool: a straightforward, secure, and trustworthy utility for sharing secrets with peace of mind. No accounts required, no complex setup, just secure sharing that puts your privacy first.