>>>How do you restrict the ability to decrypt ?
>
>Do you bank online? Do you use public wifi? Do you have e-mail on your phone?
>
>If no to all three, then IMO we should delay this conversation for a year. If yes to any of them, then how do you restrict the ability to decrypt?

Yes to all three. And in all three cases, although they may enforce encryption over the wire, the provider has no control of how I choose to store the information on my device - the information is, after all, mine and I can treat it how I wish. I don't think the same freedom could be allowed in the case of a company employee storing confidential information on a local device?