2016from public repositories
Hackvent 2016
17 challenges with 17 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 liveUncategorised15
The upstream scoreboard did not say, so neither do we.
01 Dec 1 Detours
1 official solution02 Dec 2 Free Giveaway
1 official solution03 Dec 3 Manufactory
1 official solution04 Dec 4 Language Of Us
1 official solution05 Dec 5 Boolean Fun
1 official solution06 Dec 6 Back 2 Work
1 official solution07 Dec 7 Trivialkrypto 142
1 official solution08 Dec 8 Lost In Encoding
1 official solution09 Dec 9 Illegal Prime Number
1 official solution10 Dec 10 I Want To Play A Game
1 official solution11 Dec 11 A Maze Ing Gift
1 official solution13 Dec 13 Jcoinz
1 official solution15 Dec 15 Sap Santas Admin Panel
1 official solution17 Dec 17 I Want To Play A Game
1 official solution18 Dec 19 Zebra Code
1 official solution
Cryptography1
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.
Solve it with:Cipher identifier and automatic decoderVigenere cipher solver with automatic key recoveryRSA decryption and attack runnerWiener’s attack on small RSA private exponentsIn-browser hash cracker with rule transformsLearn: Classical ciphers and frequency analysisLearn: RSA and the parameters that break it
12 Dec 12 Crypt O Math
1 official solution
Misc1
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Solve it with:Brainfuck and esolang decoderCipher identifier and automatic decoderRegex tester with match offsets and capture groupsLearn: Recognising encodings
14 Dec 14 Radio Wargame
1 official solution