At the moment there is a possibility to access anyones else "sync shares". It is dramatically small, but it exists. What would be great: 1) if we had a possibility to create our own trackers. For some situations, when I dont have Internet access, or security requirements are so that I cannot even share my "secret-key" with unknown tracker server. 2) if we had an additional authorization mechanism. 2 factor auth. Apart "secret key" for finding "sync shares" I need some "login\password" auth to have an access to the shared info. "Secret-keys" for finding shares on tracker. And "Login\Password" (or only "Password") for Client-to-Client authorization. Maybe even to use it for encryption. 3) if we had an ability to create "ReadOnly" shares. One-way syncing. Thanks!