2016weight 0.00UConn CyberSEED

UConn CyberSEED 2016

4 challenges with 4 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

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

Cipher #2
100 pts1 writeup
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
Cipher #3
200 pts1 writeup
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

Missing Flag #1
100 pts1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook
Missing Flag #2
300 pts1 writeup
Same technique in picoCTF: Permissions, Specialer, Codebook

Cryptography2

Cipher #2

Cipher #3

Misc2

Missing Flag #1

Missing Flag #2

Other 2016 events