CryptoCurrency (is) The Flag

Learn crypto through hacking

Realistic CTF challenges and guides

CCTF is the largest hacker competition for crypto/blockchain hackers. The authors focus on creating realistic challenges that cryptographers, auditors, pentesters and security engineers face on a daily base.

CCTF is independent, but accept sponsors and partners. Currenct authors are: Six, Silur, Factoreal and Rooney

Story and past CCTF events

The vision of CCTF was created at the beggining of 2019 by Six and the first round was played during the BsidesBUD information security conference. Since then, each event started with an increased number of participants and sponsorship awards. The main organizers are Six and Silur. They work together since CCTF Volume 3. and work hard on pushing the limits of the event forward. CC7F will have 15 challenges and the winners will be awarded from a $15000 prize pool.

Topics of the game from the past: cryptography, blockchain, Proof of Authority, Smart Contract security, frontrunning, mev and cryptocurrency infrastructure vulnerabilities, weak crypto, misconfigurations, leaked wallets, BIP seeds.

List of our past events:
BsidesBUD 2019, Hacktivity 2019, BDAY3.0, Hacktivity 2020, BDAY 4.0, Hacktivity 2021

Authors at past events: members of Awalcon, Cryptall, and H.A.C.K.

Related topics follow as crypto ctf, crypto, PRNG, algorithm, sha251, crack, hash, sign, password, PoW, MITM, Python, Ring0, RSA, math, xor, ecc, elliptic curve, block, verify, digest, mode, security, keccak, broken, keygen, exponent and much more.

Beginner guide:

CCTF Vol 5. writeup:

CCTF Vol 4. writeups: