“Authorized PCube buddy”: a Facebook friend that is running PCube and that has been authorized by you to enquire about your proximity. By default all PCube buddies are NOT authorized.
“Proximity computation”: Given a proximity threshold value, and the positions of two buddies, a proximity computation returns a positive result if the distance between the positions is less than or equal to the threshold value. The same term is used when positions and result are approximate values.
“Uncertainty area”: it is an area that contains your current location. Its size is determined by your privacy preferences as set in the PCube Privacy Tab. Independently from your exact location within this area, the uncertainty area is the same.
Location data collected and shared while using PCube
The encrypted information about your uncertainty area is not shared with third parties, except for authorized PCube buddies. Despite authorized PCube buddies are not explicitly informed about your uncertainty area, you should be aware that they may still learn it.If you install PCube on your mobile device, whenever PCube is running and you have logged on, it will periodically determine your location. Each time this happens, your location is transformed into the corresponding uncertainty area. Your exact location is NEVER transmitted by PCube in any form without being first generalized to the corresponding uncertainty area.
The uncertainty area is periodically transmitted from your device to our servers in an encrypted form. Our servers acquire this information but are not able to decrypt it; hence our servers are not capable of knowing your uncertainty area and, consequently, your location. Similarly, our servers do not obtain any information related to your movements. The encrypted uncertainty area may be temporarily (for a few minutes) stored on our servers, associated with your Facebook ID.
The encrypted information about your uncertainty area is not shared with third parties, except for authorized PCube buddies. Despite authorized PCube buddies are not explicitly informed about your uncertainty area, you should be aware that they may still learn it.
To stop transmitting your encrypted uncertainty area, logout from the application, or disable the proximity services from the settings menu.
You should be aware that PCube acquires your location from the operating system, like most other location-based apps. When you enable location services on your device you are asked to agree on the privacy policies that the operating system provider has defined. They may involve the release of location data to third parties; This is independent from our service and you should carefully read the terms of those policies.
Proximity data collected and shared while using PCube
Whenever PCube performs a proximity computation, due to the PCube communication protocol, the result is unknown to our servers. On the contrary, each authorized PCube buddy participating in the proximity computation learns whether you are “possibly” in proximity.
Other Data collected and shared while using PCube
While you use PCube, our servers may store your IP address. This information is used for system administration. We may also store a unique number that is used by Facebook to uniquely identify its users and/or your user ID. This information is used to retrieve your user name and the names of your buddies from the Facebook servers.
On our servers we may also store the list of your Facebook contacts and, for each of them, whether you want to share your proximity information with him/her or not. This information is used to enforce your privacy settings.
For what concerns the chat messages you exchange with your buddies, PCube only communicates with the Facebook servers and no chat message is acquired or stored by our servers. You should be aware that these messages are not encrypted and hence can be potentially eavesdropped.
The PCube service will send email notifications to the email address you have provided only in specific occasions: upon occurrence of specific events during normal operation of the app (e.g., when a friend invites you to share proximity) and on exceptional server operation condition (e.g., when service maintenance procedure may temporarily disrupt service).
We do our best to protect the information collected and shared through PCube, but no company, including us, can fully eliminate security risks connected to handling information on the Internet. In addition, PCube uses standard Wi-Fi and 2G/3G protocols for data transmission. You should know that unauthorized persons may attempt to intercept your network communications, and we encourage you to exercise caution when accessing such things as Wi-Fi hotspots.