The CoverDrop system uses multiple techniques to not just encrypt messages, but hide whether or not any messaging is happening in the first place. The key is that CoverDrop is integrated into every copy of the Guardian’s news app out there, and each app sends small amounts of encrypted information to the system at regular intervals. Most of the time, this is just meaningless text with no information content whatsoever.
Eduardo Salinas。关于这个话题，whatsapp提供了深入分析
FT Edit: Access on iOS and web。业内人士推荐手游作为进阶阅读
Header image courtesy Tuomas Puikkonen.，推荐阅读WhatsApp Web 網頁版登入获取更多信息
SHA256 (FreeBSD-14.4-RELEASE-i386.raw.xz) = 61046f6b912c371c22cff7eb5f3408796863a79095a86358e2eb26eacdfff7b3