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Re:CertiVox confirms it withdrew PrivateSky after GCHQ issue... by jabbernotty on Thursday December 12, 2013 @07:53AM (#6894152)
I don't know anything about the implementation, but I would assume that the idea is to avoid having the service provider be a single point where complete failure can occur. Perhaps this new system offloads that risk to the customer.

But then I get confused, what service is the service provider providing if the customer still needs to carry around half of 'the data'?

Re:CertiVox confirms it withdrew PrivateSky after GCHQ issue... by JonnieCache on Thursday December 12, 2013 @07:54AM (#6894155)
Splitting it in two does not mean splitting it in half.
Re:CertiVox confirms it withdrew PrivateSky after GCHQ issue... by Eifrig on Thursday December 12, 2013 @08:44AM (#6894326)
Found some detail of "splitting in two" to assure no single point of failure here https://certivox.org/pages/viewpage.action?pageId=10420248 "Distributed Trust Authority"