"Google has phenomenal amounts of personal information," added Tunstall-Pedoe. "They know more about you than you do. Facebook is the same. Just think how much information there is on the Google servers for Gmail. The comforting thing is that obviously their reputation depends on not breaching the trust, if there was a scandal about it that would be absolutely disastrous for them. So they have every incentive to maintain their users trust."
However, Tunstall-Pedoe agreed: "The fact is that we are going to have to find ways of solving that, whether it involves keeping the data separate from the service providers, but the service providers need the data in order to provide the service. This isn't a problem that's specific to Siri, it's a problem with cloud computing."
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