This is some challenges I created for CTF competitions.
The difficulty is rated by me, and it is only consistent within a single competition. While I tried to keep it consistent by it does not really work 😞, so don't be surprised if you find a challenge with lower rating that is harder than a challenge with higher rating.
Also published here for better math rendering.
Name Category Tags Difficulty Futago Crypto, CSC 1 RSA ★ RNG++ Crypto LCG ★★ babyRSA Crypto RSA, ECC ★★ Top Secret Crypto GF, dlog ★★☆ Cipher Switching Service Crypto RSA, ElGamal ★★☆ Signature Crypto ECDSA, LLL, AES-CTR ★★★ RNG+++ Crypto LCG, LLL ★★★☆ Nim Notes Web Script Gadgets, CSRF, CRLF Injection, CSP ★★★☆ Genie 2 Web, Crypto Path traversal, AES-CBC, Deserialization ★★★☆ Just a pyjail Misc Pyjail ★★★
Name Category Tags Difficulty BabySSS Crypto SSS, CRT ★☆ Superprime Crypto Binary Search, Prune and Search ★★☆ Chimera Crypto ECM, LLL, ECDLP, HSSP ★★★★ LemMinX Misc LSP, XXE ★★★ Secure Paste Web, Crypto JSONP, Key Confusion, DOMPurify, CSP ★★★★
Name Category Tags Difficulty Share Crypto SSS, CRT ★★ EZRSA Crypto ECC, Wiener, ECM ★★☆ Echo Crypto RSA, Index Calculus, LLL ★★★ Random Shuffling Algorithm Crypto Noisy CRT, Coppersmith ★★★☆ Collision Crypto Collision ★★★☆ Lisp.js Misc Node.js Jail ★★★ Login System Web TE.TE, JSON Injection, YAML ★★★ Canvas Web JS Jail, Worker, CSP ★★★☆ Harmony Web Electron ★★★★☆
Name Category Tags Difficulty ZKPoF Crypto Python, Coppersmith ★★ BrokenShare Crypto SSS, LLL ★★★ Hyper512 Crypto LFSR, FCA ★★★☆ ECLCG Crypto ECDSA, LCG, LLL ★★★★ MatProd Crypto Matrix, LLL ★★★★ Flag Reader Misc Tar ★☆ RClonE Web CSRF, RCE ★★ Truth of NPM Web Deno, LFI, RCE ★★★ Private Browsing+ Web XSS, Response Splitting ★★★★
Name Category Tags Difficulty lf3r Crypto LFSR ★★☆ coast Crypto Isogeny ★★☆ notitle Crypto Algebra, DLP, LLL ★★★ pacap Crypto Coppersmith ★★★ vokram Reverse Markov Algorithm ★★★ readme Web Path Normalization ★ readme2 Web Bun, HTTP ★★ calc Misc Pyjail ★★★
Name Category Tags Difficulty LiveMD Web XSS ★★★☆
Name Category Tags Difficulty ffmac Crypto Linear, GB ★★★
These two challenges are created before I became a board of ImaginaryCTF.
Name Category Tags Difficulty KVIN Web/Misc JavaScript ★★
Name Category Tags Difficulty Vault Web XSS, Cache ★★☆
Name Category Tags Difficulty Integrity Crypto CRT-RSA, Coppersmith ★☆
Name Category Tags Difficulty Safe Pickle Misc Pickle ★☆
Name Category Tags Difficulty Leet Universe Crypto Number Theory ★★
Name Category Tags Difficulty Three Pieces Crypto Number Theory ★☆
Name Category Tags Difficulty readme3 Web HTTP, Bun ★★
Name Category Tags Difficulty MDLP Crypto DLP, LLL ★★ MDLP v2 Crypto Coppersmith ★★☆
Name Category Tags Difficulty MLFSR Crypto Stern's Attack, LLL ★★★
Name Category Tags Difficulty MagicHash Crypto CRC, MD5, Collision ★★
Name Category Tags Difficulty JeetQode Misc PPC, JQ ★☆ B64DLE Misc AES-CTR, Pickle, Python Format String ★★☆ SC Crypto Classic ☆ Fast Cipher Crypto Modular Arithmetic ☆ shamiko Crypto SHA1, DSA ★☆ Really Strange orAcle Crypto GCD, Binomial Theorem ★☆ pettan Crypto RSA, MT19937 ★★☆ pekobot Crypto Invalid Curve Attack ★★★ Flag Checker Reverse ROP, Pickle, RSA-like ★★ Private Browsing Web SSRF, Redis, PHP, Deserialization ★★ UTF-8 Editor Pwn C++, std::vector, OOB, GOT overwrite ★★ SAAS Pwn C++, Copy Constructor, UAF ★★☆
AIS3 EOF 2023 - koh-jeopardy Name Category Tags Difficulty prsa Crypto RSA, Paillier ★★ zkdlp Crypto ZKP, MT19937 ★★☆
Security BSides Ahmedabad CTF 2022 