IIRC The link contains an anchor `#abc123` which is the decryption key. Browsers do not send anchor parts of the URL to the server, and so the browser decrypts.

IIRC The link contains an anchor `#abc123` which is the decryption key. Browsers do not send anchor parts of the URL to the server, and so the browser decrypts. Hinges on the browsers never sending that key, though.