Crypto CTF 2021
26 challenges with 34 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 CTFtimeMisc22
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
- galois-field
- brute-force
Same technique in picoCTF: Permissions, Specialer, Codebook
- matrix
- primes
- randomness
Same technique in picoCTF: Nothing Up My Sleeve, Permissions, Specialer
Same technique in picoCTF: Permissions, Specialer, Codebook
- elliptic-curve
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Cryptography4
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.
- aes-cbc
- aes
- crypto
- blockcipher
Same technique in picoCTF: Timestamped Secrets, AES-ABC, Compress and Attack
- hash-length-extension-attack
- md5
- sha1
Same technique in picoCTF: hashcrack, It is my Birthday 2, StegoRSA
- rsa
- crypto
- primes
- crt
Same technique in picoCTF: StegoRSA, john_pollard, rsa_oracle
- aes-gcm
- nonce-reuse
Same technique in picoCTF: Timestamped Secrets, AES-ABC, Compress and Attack