https://overkazaf.github.io/blogs/tags/sl3000/Recent content in SL3000 on +5 Security ResearchHugozh-cnMon, 24 Aug 2026 14:00:00 +0800https://overkazaf.github.io/blogs/posts/playready-pro-license-sl3000-deep-dive/Mon, 24 Aug 2026 14:00:00 +0800https://overkazaf.github.io/blogs/posts/playready-pro-license-sl3000-deep-dive/从 DASH 里的 PlayReady SystemID 开始，逐字节拆开 PSSH、PRO 与 WRMHEADER，再沿 License、设备证书、SL2000/SL3000、TEE 和 OPL 还原 PlayReady 的完整信任链，并给出可复现的自有内容实验与参考项目地图。