2024weight 24.83CyberSpace

CyberSpace CTF 2024

5 challenges with 7 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

Misc3

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

ezcoppersmith
2 writeups
Same technique in picoCTF: Permissions, Specialer, Codebook
Share The Flag
499 pts1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook
trendy windy trigonity
417 pts1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook

Cryptography2

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

flagprinter
50 pts2 writeups
- crypto
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
ModulusRSA
50 pts1 writeup
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC

Misc3

ezcoppersmith

Share The Flag

trendy windy trigonity

Cryptography2

flagprinter

ModulusRSA

Other 2024 events