WhatsApp 等应用程序如何显示联系人的个人资料图片而不将其存储在服务器上

How does applications like WhatsApp show profile pictures of the contacts without storing them on server

我知道 WhatsApp 会对您的地址簿进行哈希处理,以便显示在 android 设备上安装了 WhatsApp 的联系人。但是,我无法理解当我第一次安装应用程序而不将它们存储在服务器上时,WhatsApp 如何发送这些联系人的个人资料照片?我从 WhatsApp 网站上查看了法律说明,除了以哈希格式存储地址簿外,没有提到在服务器上存储个人资料照片吗?

有谁知道 WhatsApp 如何在不在中央服务器上存储个人资料照片的情况下实现上述目标

  1. User Status Submissions

A. The WhatsApp Service allows WhatsApp users to submit status text, profile photos and other communications submitted by you, as well as the automatic submission of your “last seen” status (collectively, the "Status Submissions"). These Status Submissions may be hosted, shared, and/or published as part of the WhatsApp Service, and may be visible to other users of the Service who have your mobile phone number in their mobile phone and which you have not expressly blocked

Whatsapp 实际上将个人资料照片保存在他们的服务器上。另一方面,如果您需要在没有中央服务器的情况下以某种方式拥有此类功能,则可以使用各种 P2P 托管,如 torrent 或 .onion 站点技术。