This is the list of the challenges made by me.
If you have any questions, feel free to leave a question on Issues tab.
| Challenge Name | CTF Name | Difficulty | Tag | References |
|---|---|---|---|---|
| [crypto] PrimeGenerator | 2022 Codegate Quals | Medium | RSA, Coppersmith attack, Chinese remainder theorem | |
| [crypto] GIGA Cloud Storage | 2022 Codegate Finals | Hard | RSA, Man in the Middle attack | eprint 2022/959(MEGA: Malleable Encryption Goes Awry) |
| [crypto] The Game of DES | 2022 WACON Quals | Easy | DES, DES weak key | |
| [crypto] Zero time signature | 2022 WACON Quals | Easy | Hash-based signature | |
| [misc] hashashashashash | 2022 WACON Quals | Medium | Bitcoin Proof-of-Work | |
| [reversing] Type confusion | 2022 WACON Quals | Medium | IEEE-754 format | |
| [crypto] BYOS | 2022 WACON Finals | Hard | SPN, Weak permutation | |
| [crypto] mistake | 2022 WACON Finals | Easy | Weakness of ECB mode | |
| [misc] mosaic | 2022 WACON Finals | Easy | Image Processing, backtracking | |
| [misc] sudokugame | 2022 WACON Finals | Medium | Game Theory | |
| [crypto] NZK-SIARK | 2023 CCE Quals | Medium | AES, ZK-SNARK | |
| [crypto] Baby cipher | 2023 WACON Quals | Medium | SPN, MiMC, Ciphers over Ring | |
| [crypto] PSS | 2023 WACON Quals | Medium | Secret sharing, MPC-in-the-head | eprint 2018/1212(Multi-Target Attacks on the Picnic Signature Scheme and Related Protocols) |
| [crypto] White arts | 2023 WACON Quals | Medium | Symmetric primitives, Indistingushiability | |
| [misc] let me win | 2023 WACON Quals | Easy | Lineaer programming | |
| [misc] mic check | 2023 WACON Quals | Easy | Fake 404 error | |
| [crypto] The Game of DES2 | 2023 WACON Finals | Hard | DES, Linear cryptanalysis, Ciphertext only attack | DOI 10.1007/3-540-48285-7_33(Linear Cryptanalysis Method for DES Cipher) |
| [crypto] anti Kerckhoffs | 2023 Codegate Quals | Hard | SAS construction, Hidden S-box | DOI 10.1007/3-540-44987-6_24(Structural Cryptanalysis of SASAS) |
| [crypto] secure Prime Generator | 2023 Codegate Quals | Medium | RSA, MPC, Malicious model | eprint 2020/370(Multiparty generation of an RSA Modulus) |
| [crypto] Tiny Encryption | 2023 Codegate Finals | Hard | LowMC variants, Difference enumeration attack | eprint 2018/859(Cryptanalysis of Low-Data Instances of Full LowMCv2) |
| [crypto] discrete_log | 2023 Whitehat Quals | Medium | Discrete logarithm, Pohlig Hellman algorithm, Chinese remainder theorem | |
| [crypto] Blocks | 2023 Whitehat Finals | Easy | Block cipher modes of operation |