Zero-knowledge encryption
Encrypt & Send
Compose a sensitive message, encrypt it in your browser, and share a secure viewer link with a 8-word spoken key — two separate channels, one unbreakable delivery.
How this works
- 1Write your message and attach any files. Everything is encrypted on your computer before it leaves.
- 2Send the link. We can email it for you, or you can copy it and send it yourself.
- 3Call your recipient and read them the words. They need both the link and the words to open it — that's what stops anyone else reading it, even us.
Your recipient doesn't need an Office Guard account.
Sign in to send
Sending an encrypted message requires an Office Guard account. Sign in to continue — your recipient never needs an account.
Sign in opens in a new tab. This page will update automatically once you're signed in.
All encryption happens within your secure browser. It cannot be read or deciphered without separate two channel authentication.