https://overkazaf.github.io/blogs/tags/securityguard/Recent content in SecurityGuard on +5 Security ResearchHugozh-cnWed, 26 Aug 2026 15:36:00 +0800https://overkazaf.github.io/blogs/posts/taobao-securityguard-mtop-four-signatures-boundaries/Fri, 17 Apr 2026 20:35:00 +0800https://overkazaf.github.io/blogs/posts/taobao-securityguard-mtop-four-signatures-boundaries/从一份历史调用链和淘宝官方隐私政策出发，重新判断 x-sign、x-umt、x-mini-wua、x-sgext 所在的协议层，以及客户端逆向看不到的交易风控部分。