论文标题
相互接触发现
Mutual Contact Discovery
论文作者
论文摘要
联系人发现使消息传递服务的新用户可以找到已经使用该服务的现有联系人。同样，现有用户了解加入的新用户。这创建了一个隐私问题：已经通知您加入其联系人列表的服务中已经有您的电话号码的任何人。即使您不认识那个人，或者是您渴望与之分开的前任或前同事，并且很久以前就删除了其联系方式。为了解决这个问题，我们提出了一个相互联系的发现协议，该协议只允许用户在彼此的联系人列表中（仍然）两者（仍然）相互发现。相互联系发现具有更大的优势，即与传统的单方面联系发现相比，它可以以更隐私友好的方式（例如保护社交图）实施，而无需依赖可信赖的硬件。
Contact discovery allows new users of a messaging service to find existing contacts that already use that service. Existing users are similarly informed of new users that join. This creates a privacy issue: anyone already on the service that has your number on their contact list gets notified that you joined. Even if you don't know that person, or if it is an ex or former colleague that you long parted with and whose contact details you deleted long ago. To solve this, we propose a mutual contact discovery protocol, that only allow users to discover each other when both are (still) in each other's contact list. Mutual contact discovery has the additional advantage that it can be implemented in a more privacy friendly fashion (e.g. protecting the social graph from the server) than traditional, one-sided contact discovery, without necessarily relying on trusted hardware.
