The submission portal is available at 545fyf3eb5nu4zcecxmr67q25i3tms75og4haqaqtunb6mwpeuelwryd.onion.
The submission portal is a separate onion service for sending content to us end to end encrypted. It runs using entirely free and open source software.
When you make a submission, it is encrypted with our public key on your computer before being sent over the internet. It is roughly equivalent to sending us a PGP encrypted email, but you don’t need to create an email account to do it.
The submission website currently needs to store a session cookie in your browser to function correctly. This is only used for validating the CAPTCHA. Eventually a cookie will not be required for this.
Encryption is done using https://openpgpjs.org/ which is the same library that proton.me uses for their service.