Regarding 3, securing against well-informed attackers (ie, family or spouses) is really difficult. They have access to their partner's phone, know their last fo

Regarding 3, securing against well-informed attackers (ie, family or spouses) is really difficult. They have access to their partner's phone, know their last four addresses, have their email on an iPad, so on and so forth. Bruce discusses the challenges with it in a recent paper [1]. Really interesting and worth a read, IMO. [1]: https://www.schneier.com/academic/paperfiles/Privacy_Threats_in_Intimate_Relationships.pdf https://www.schneier.com/academic/paperfiles/Privacy_Threats...