#BSidesSF2019CTF https://ctftime.org/task/7764 (decrypto's signature cookie is important.. the text at the top is wrong. Sorry!) Hack the mainframe! Location - https://decrypto-6213399b.challenges.bsidessf.net Web +Crypto。幸いにも問題情報…

#BSidesSF2019CTF Oracular Rift Location - pythia-a0227fc1.challenges.bsidessf.net:1521 多分RSA の Bleichenbacherのやつ

#BSidesSF2019CTF Some security problems are black and white: a key is either compromised or it isn't. Location: https://storage.googleapis.com/bsides-sf-ctf-2019-large-artifacts/keytree_nodes.tar.xz (Note: Flag is different from usual form…

#BSidesSF2019CTF https://ctftime.org/task/7749 Location - rsaos-774c47ae.challenges.bsidessf.net:9999 言われた場所につなぐと、何やらCLIのようなシステムに接続できる。こういう時は ? や help を駆使するのが良いことになっているのでやると、help…

#BSidesSF2019CTF https://ctftime.org/task/7747 Log in as administrator! (Check out the user cookie) Location - https://mixer-f3834380.challenges.bsidessf.net/ Web + Cryptoの問題。 first/last nameを求める適当にログインしてみる。 Welcome bac…