Microsoft's BitLocker provides full disk encryption in Windows to protect user data. It is specifically useful if one's computer is physically stolen and the thief attempts to access confidential data on the computer's disk blocks for malicious purposes. Although this encryption is an important privacy protection, it can be problematic for law enforcement agencies. Law enforcement may want access to decrypted data that Microsoft cannot provide because Microsoft cannot break its own encryption, and this has been particularly controversial when such encryption is applied to mobile phones. http://www.nytimes.com/2014/09/27/technology/iphone-locks-out-the-nsa-signaling-a-post-snowden-era-.html How should companies that encrypt data on their devices balance personal privacy with public needs such as law enforcement?