2022weight 24.03Mad H@tters

WRECKCTF 2022

5 challenges with 5 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 CTFtime

Cryptography3

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 decoder Vigenere cipher solver with automatic key recovery RSA decryption and attack runner Wiener’s attack on small RSA private exponents In-browser hash cracker with rule transforms Learn: Classical ciphers and frequency analysis Learn: RSA and the parameters that break it

baby_rsa
1 writeup
- rsa
Same technique in picoCTF: StegoRSA, john_pollard, rsa_oracle
rsa
1 writeup
- rsa
Same technique in picoCTF: StegoRSA, john_pollard, rsa_oracle
token
1 writeup
- crypto
- padding-oracle
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC

Misc2

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 decoder Cipher identifier and automatic decoder Regex tester with match offsets and capture groups Learn: Recognising encodings

barcode
1 writeup
- image
Same technique in picoCTF: Permissions, Specialer, Codebook
spin
1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook

Cryptography3

baby_rsa

rsa

token

Misc2

barcode

spin

Other 2022 events