I have been interested and involved with computer security from the early days. I found this news regarding Research in Motion (manufacturer of Blackberry) stating:
"...its technology does not allow any third party - even the company itself - to read information sent over its network."
The article talks about the Indian government's reluctance to allow the widespread use of Blackberries. RIM was quoted further stating:
"The Blackberry security architecture for enterprise customers is purposefully designed to exclude the capability for Research in Motion (RIM) or any third party to read encrypted information under any circumstances."