Get the flag. bcs.7z $ nc bcs.chal.ctf.westerns.tokyo 3971 Summary: recovering AES key from partial subkey leaks.
Tag: MMACTF
Sep 05
Tokyo Westerns/MMA CTF 2016 – Pinhole Attack (Crypto 500)
Decrypt the cipher text with a pinhole. $ nc cry1.chal.ctf.westerns.tokyo 23464 pinhole.7z Summary: attacking RSA using decryption oracle leaking 2 consecutive bits in the middle.
Sep 07
MMA CTF 2015 – Motto Mijikai Address (Crypto/Web 100+300)
Login as admin and get the flag1. mmaddress.7z Summary: breaking HMAC-CRC512