# #understanding Nullifiers: Preventing Duplicate Actions // #privacy #crypto #web #blockchain

- Channel: [Ethereum Cypherpunk Congress](https://streameth.org/ethereum-cypherpunk-congress)
- Watch: https://streameth.org/watch/yt-Ltf9ZcVZDKQ
- YouTube: https://www.youtube.com/watch?v=Ltf9ZcVZDKQ