ECTF 2016
11 challenges with 26 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.
Full task list on CTFtimeCryptography3
Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.
Counterattack
4 official solutionsAlso written up in: ctfs/write-ups-2016, ctfs/write-ups-2016, vishwaraj/write-ups-2016, vishwaraj/write-ups-2016
Cryptofun
4 official solutionsAlso written up in: ctfs/write-ups-2016, ctfs/write-ups-2016, vishwaraj/write-ups-2016, vishwaraj/write-ups-2016
Also written up in: ctfs/write-ups-2016, vishwaraj/write-ups-2016
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
Misc3
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Also written up in: ctfs/write-ups-2016, vishwaraj/write-ups-2016
- misc
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
Ebufgne
2 official solutionsAlso written up in: ctfs/write-ups-2016, vishwaraj/write-ups-2016
idIoT
2 official solutionsAlso written up in: ctfs/write-ups-2016, vishwaraj/write-ups-2016
Reverse engineering3
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
Defushal
2 official solutionsAlso written up in: ctfs/write-ups-2016, vishwaraj/write-ups-2016
Lorem
2 official solutionsAlso written up in: ctfs/write-ups-2016, vishwaraj/write-ups-2016
Also written up in: ctfs/write-ups-2016, vishwaraj/write-ups-2016
Uncategorised2
The upstream scoreboard did not say, so neither do we.
Also written up in: p4-team/ctf
Also written up in: p4-team/ctf