# Reference
# CTF and Hands-on Learning
- Solidity by Example (opens new window)
- Ethernaut (opens new window)
- Damn Vulnerable DeFi (opens new window)
- A Summary Of 100+ CTF Blockchain Challenges Using Solidity (opens new window)
- Ciphershastra (opens new window)
- EhterHack (opens new window)
- Capture The Ether (opens new window)
- Blocksec CTFs (opens new window)
# Online Courses
- CS251: Cryptocurrencies, blockchains, and smart contracts (opens new window)
- Decentralized Finance MOOC (opens new window)
- CIS7000: Web3.0 Security (opens new window)
# Books
# Useful Links
← Schedule