Closed pyrodie18 closed 5 years ago
QC'ed Difficulty: 5 I'm not sure I could have done this without the key, but it could be because I have never done manual AES decryption before, but the codes.txt file seems to have some critical typo errors. acsc18{ivan_wentn_is_great_but_one_look_under_the_hood} : 3b4bd5b6f194cbbb1495a469d611c9a49a60791aba95dbaedd2994d67790760201582d16b6eba3152076c4c308a01e8fba99ded4683389cbf0253ba93b5908f5 -Should this read, "acsc18{ivans_winton..."? That would make this line up better. acsc18{this_is_tnly_if_it_doesnt_look_like_the_plain_text} : ef002b7295f186d228eed3d9e0a9e922a0779b858857a3a3d04304fcde225ce7078b383949d500ba73f9dd9258801c4137494c3df395c4500b2b36c7bb2ec8bd -Should this read, "...this_is_only..."? acsc18{one_two_three_four_i_declare_a_thumb_wardd_pipes} : 65a67d9d1b3a3a207813fe56cf87374ee07b5bd56069eb93f67f96cfecaffed00cd2d8374a493fd451d6e9129db46c3975053f0b39dccb6e9eb88ae40ec8aa9f -Should this read, "...thumb_war_pipes}"
@mhuiz Just checked and there's not typo's there. The misspelled words fall outside of the portion of the flag that that line represents. In all of those cases, they were misspelled to allow the block boundaries to line up where they need to.
Yep, I gave it a shot. Back to the books on AES.
50 points
Unfortunately we lost the key. On the bright side though we did encrypt a bunch of other test flags with the same key before we lost it. Can you help us out?
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