> If they don't store the contacts, or even a hash of the contact, how can you figure out who was talking to who?
Think of it like email. The body is encrypted, the subject is encrypted, any attachments are encrypted, but in order for them to route the message to the correct destination every message you send still has a "To:" field - their server still decides who to send the notification to.
They don't need to read the contacts or anything of the sort - they just read the "To:" field.
Think of it like email. The body is encrypted, the subject is encrypted, any attachments are encrypted, but in order for them to route the message to the correct destination every message you send still has a "To:" field - their server still decides who to send the notification to.
They don't need to read the contacts or anything of the sort - they just read the "To:" field.