https://wjddml.github.io/en/tags/crypto/Recent content in Crypto on spectatarHugoen-usFri, 18 Sep 2026 00:00:00 +0000https://wjddml.github.io/en/writeups/what-who/Fri, 18 Sep 2026 00:00:00 +0000https://wjddml.github.io/en/writeups/what-who/Unpack a custom container format to extract VM bytecode, recover the ISA, and invert the six challenge questions.https://wjddml.github.io/en/writeups/the-cinder-engine/Sun, 06 Sep 2026 00:00:00 +0000https://wjddml.github.io/en/writeups/the-cinder-engine/Recover the ISA of a custom VM embedded in a stripped ARM aarch64 binary, then invert the 8-round SPN block cipher implemented inside its firmware to recover the flag.