Ctfx 2016
16 challenges with 31 published solutions between them. CTFtime has no listing for this event at all, so nothing built on CTFtime can show what it was made of. These writeups were found in public repositories instead. Each link is pinned to the commit it was read from.
Where these writeups liveCryptography5
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.
Blocky 1
2 official solutionsCustomauth 100
2 official solutionsLambda 50
2 official solutionsLittle Crypto Gambler 150
2 official solutionsBlocky 200
1 official solution
Forensics5
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
Corrupt 150
2 official solutionsCrash 50
2 official solutionsiTrash 100
2 official solutionsPassword 100
2 official solutionsPgp 200
2 official solutions
Misc2
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Cafebabe 150
2 official solutionsMessage 150
2 official solutions
Binary exploitation2
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
Dat Boinary 250
2 official solutionsGuesslength 100
2 official solutions
Web2
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
Harambehub 100
2 official solutionsNorth Korea 50
2 official solutions