PicasaWeb is an online photo sharing tool where you can send invites to your friends to view, save and comment on your photos. Coming from the Google stable, this web service has many fans the world over. This website provides two levels of security,namely account level privacy and album level settings.
For account privacy settings, log on to your PicasaWeb account and click the 'Settings' link. On the 'Settings' page, click the 'Privacy and Permissions' tab. Set the changes as required. You can set album level privacy while creating the album itself. For changing settings in existing albums, go to the specific album. Click the 'Edit' option and 'Album Properties' from the drop-down list. Since it supports collaborative photo uploading and sharing,you can also create friend groups and change settings as required.