Your shared secret is
9Jsp08uSEP_dE--xLDcyAKrEwl3l
If you want to communicate with me privately somewhere in public, use this as a password to encrypt stuff, and only I can decrypt it. Or if you make something at http://yourwebsite.i2p/9Jsp08uSEP_dE--xLDcyAKrEwl3l/ then all you have to tell me is http://yourwebsite.i2p, and only I can guess the name of the hidden directory. Never share your secret anywhere, or they can spy on what you say to me, and look at your private messages here.
Whenever you go here, I can show you private messages that only you can read. Anyone else connecting (who doesn't have that cookie) will see a different set of messages, just whatever I chose to leave for them.