Encryption does not address the security problems of &quot;cloud&quot; services if your threat model includes eg BND. Traffic&#x2F;metadata analysis is plenty to find out what you&#x27;re doing and who you&#x27;re doing with. Secondly if you distrust the &quot;cloud&quot; service provider, end-to-end encryption for IM&#x2F;storage is moot if you are still using service provider&#x27;s client software for X.<p>(This for one microsoft-applicable meaning of &quot;cloud&quot;. It baffles me why tech people have so eagerly adopted such an ill-defined marketing term)