His unsecure comm line is a target, a honey pot, for all espionage agencies and hackers around the world. If I was in that business, I would assign a high priority to intercept Obama's communications. He's a fool.
Where all hackers who start thinking about attacking his little toy just go to Blackberry.com:
“Data encryption on the BlackBerry device
Administrators can set an IT policy to make sure that all BlackBerry® device user data stored in the BlackBerry device applications is encrypted locally in flash memory. You can create aBlackBerry Java® Application that uses APIs to register the data so that the encryption service encrypts the data with the same security key before storing it in flash memory.”
“Data encryption in transport
If you use the BlackBerry® Enterprise Server as the network gateway for your application, the BlackBerry Enterprise Server encrypts data using AES or TripleDES encryption at all points in the connection between the BlackBerry device and the BlackBerry Enterprise Server behind the organization’s firewall. If you require data to be encrypted further between the BlackBerry Enterprise Server and the destination server, you can use the HTTPS protocol and use SSL/TLS encryption.
If your application uses the BlackBerry® Internet Service or the Internet gateway of the wireless service provider, data traffic is not encrypted. If your BlackBerry device users prefer, you can use HTTPS to encrypt the data, or you can use the Java® APIs for encryption to apply your own symmetric key or public key cryptography.”
http://na.blackberry.com/eng/deliverables/5827/Data_encryption_and_BB_applications_447284_11.jsp