Add medusa and trailOfBits's security guide

Author: mnusurov

readme.md

@@ -64,13 +64,15 @@ A curated list of carefully selected Solidity resources, tools, tutorials, and b
 - [Smart Contract Security Verification Standard](https://securing.github.io/SCSVS/) - Security checklist
 - [EEA EthTrust Security Levels Specification](https://entethalliance.org/specs/ethtrust-sl/) - Smart contract security certification requirements
 - [Smart Contract Security Field Guide](https://scsfg.io/) - Best practices and vulnerabilities resource
+- [Building Secure Smart Contracts](https://github.com/crytic/building-secure-contracts) - Security guidelines & training by Trail of Bits
 
 ## Security Analysis Tools
 
 - [Slither](https://github.com/crytic/slither) - Static analysis framework for Solidity
 - [Solhint](https://github.com/protofire/solhint) - Solidity linter for security and style guide validations
 - [Surya](https://github.com/ConsenSys/surya) - Utility for smart contract systems analysis
 - [Echidna](https://github.com/crytic/echidna) - Property-based fuzzer for smart contracts
+- [Medusa](https://github.com/crytic/medusa) - Parallel fuzzing engine for smart contracts with advanced techniques
 - [Certora Prover](https://www.certora.com/) - Formal verification for smart contracts
 - [Diligence Fuzzing](https://consensys.io/diligence/fuzzing/) - Advanced smart contract fuzzing tool
 - [Olympix Static Analyzer](https://www.olympix.ai/free-static-analyzer) - Free Solidity static analysis tool