A recently surfaced Microsoft patent focuses on technology that could be used to spy on VoIP users' conversations without the detection of participants. Redmond originally applied for the patent in 2009, well before its move to buy up VoIP provider Skype. This technology may have been developed with an eye to selling it to government agencies. Microsoft (Nasdaq: MSFT) has applied for a patent on technology that may let its user secretly intercept Voice over IP (VoIP) communications, amend the content and store it. The application was filed in December 2009 and was recently made public. The technology could allow...