Ideally all cloud applications hostable on any platform would just provide the following services to clients:
A. rendezvous services so clients can connect to one another,
B. storage/retrieval of encrypted data where the host does not have the key to decrypt,
C. transport of encrypted data which cannot be known by the host due to B above.
> How can you trust him to have redundant networks
You can't, so abstract that away at the application layer. Make it not dependent on a single host or network.
Your data has to be decrypted somewhere to be useable, how would that work?
As direwolf20 says below, at the endpoints.
For a real world example, check out Tahoe LAFS: https://github.com/tahoe-lafs/tahoe-lafs
at the endpoints
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