Share a secret
It's encrypted in your browser before it leaves your device, so no one in between can read it, not even this server. You get a single-use link to send, and it self-destructs the moment it's opened.
Your link is ready
Send this to the person who needs it. It opens once, then it's gone for good.
A secret was shared with you
Reading it now. This is the only time it can be opened.