CipherOnce lets you share sensitive information with full control. Everything is encrypted on your device and automatically deleted after access or expiration.
No registration required • No tracking • Privacy by default
Passwords, API keys, confidential documents, and sensitive messages can live forever in inboxes, backups, and chat logs — even after you think they’re deleted. Accidental leaks, compromised accounts, or insider errors put your data at risk.
Real Security Example
A developer shares database credentials in Slack. Months later, an attacker gains access to the workspace. Even “deleted” messages can be retrieved, leading to full database compromise.
CipherOnce keeps secrets secure, private, and temporary — automatically.
Share files, passwords, API keys, or messages with one-time access, expiration, and full encryption. No traces, no logs, no risk.
Three simple steps. Military-grade security.
Messages, files, and secrets are encrypted on your device before being sent. CipherOnce never sees your data.
Share a secure link or message with full control, including expiration and download permissions.
Once viewed or expired, the content is permanently deleted and cannot be accessed again.
Built with security professionals in mind
We cannot decrypt your secrets. Period. The encryption key never leaves your device.
All encryption happens in your browser using the Web Crypto API. We never see plaintext.
Secrets are deleted immediately after viewing. No grace period, no 'trash bin', no recovery.
Each secret can only be viewed once. Multiple access attempts are automatically blocked.
Set custom expiration times from 5 minutes to 7 days. Unread secrets auto-delete.
Share documents, images, and files up to 20MB with the same encryption standards.
Perfect for offline or in-person sharing. Scan and access securely.
We do not log the content of your secrets. Our architecture ensures your privacy by design.
Start sharing immediately. No registration, no tracking, no data collection.
From startups to Fortune 500 companies
Transparency in design and implementation
All messages, files, and secrets are encrypted on your device before being sent. The encryption key stays with the link and is never sent to our servers.
CipherOnce servers only store encrypted data. We do not have access to the encryption keys and cannot read, decrypt, or recover your content.
Once content is viewed or expires, it is permanently deleted. There are no backups, archives, or recovery options.
We do not read your content or track your activity. CipherOnce avoids unnecessary data collection and does not sell or analyze your private information.
See the difference for yourself
| Feature | Email/Chat | CipherOnce |
|---|---|---|
| End-to-end encrypted | ||
| Self-destructs after reading | ||
| No server-side storage | ||
| Zero knowledge architecture | ||
| No permanent logs | ||
| Cannot be forwarded | ||
| Time-based expiration | ||
| No account required |
