Open-sourcing helps though. Also, relying on ISO for the standard (which has been sketchy in the past when it comes to Microsoft, see also OOXML) was probably not a good idea. Microsoft doesn't have a great reputation for security either.
It's true, ultimately cloud security relies on trust, but I don't think Microsoft has done enough to deserve my trust, even if this is a good step forward.
It's true, ultimately cloud security relies on trust, but I don't think Microsoft has done enough to deserve my trust, even if this is a good step forward.