An anonymous reader writes "Microsoft announced yesterday their plans to encrypt customer data to prevent government snooping. Free Software Foundation executive director John Sullivan questions the logic of trusting non-free software, regardless of promises or even intent. He says, 'Microsoft has made renewed security promises before. In the end, these promises are meaningless. Proprietary software like Windows is fundamentally insecure not because of Microsoft's privacy policies but because its code is hidden from the very users whose interests it is supposed to secure. A lock on your own house to which you do not have the master key is not a security system, it is a jail. ... If the NSA revelations have taught us anything, it is that journalists, governments, schools, advocacy organizations, companies, and individuals, must be using operating systems whose code can be reviewed and modified without Microsoft or any other third party's blessing. When we don't have that, back doors and privacy violations are inevitable.'"