This year marks 5 year since I gave my first blockchain/web3 related presentation at DEFCON 25 when I presented Porosity which was an experimental decompiler and static analysis tool for Ethereum Virtual Machine bytecode, but also mentioned on why we should keep an eye on WebAssembly Virtual Machines back when eWASM was being drafted and an option for Ethereum as a replacement for EVM itself. in his A Journey into Fuzzing WebAssembly Virtual Machines presentation, while Thomas Roth (@ghidraninja) focused on fuzzing the Solana’s eBPF Virtual Machine (based on Quentin Monnet’s interpreter & just-in-time compiler: rbpf) in his Solana JIT: Lessons from fuzzing a smart-contract compiler presentation.