A BlackBerry Messenger (or BBM) pin is a unique number that is associated with a BlackBerry device. It uniquely identifies the device, particularly for the use of BlackBerry's Messenger services, in order to route and track messages, emails, and other data between devices and accounts within the RIM network and the networks of supporting mobile providers. Because of this, it is often tracked by BlackBerry Enterprise Servers and related BlackBerry services. It cannot be altered manually on a device by the user.
While BBM PIN messages are encrypted by default, breaking this encryption is trivial, which renders it useless.
