GCHQ (UK's 'NSA') Forced secure email service PrivateSky to shut down early 2013

Significant discussion here: https://news.ycombinator.com/item?id=6893947

that submission is from a different source (itsecurityguru.org) so this one may have different details.

There's another version here: https://news.ycombinator.com/item?id=6896127

    The real story on the PrivateSky takedown
    (certivox.com)

And here: https://news.ycombinator.com/item?id=6900267

    GCHQ Forced Secure Email Service PrivateSky to Shut Down
    (ibtimes.co.uk)