_Follow along with this video:_ --- ### MEV - Recap Mev refers to the potential attack vector whereby a miner, node, or bot uses knowledge gleaned from the mempool to their advantage. **Types of Mev Attacks:** - Front-running - JIT (Just In Time) - Sandwich - Many more... ### Protecting Against Mev Attacks As mentioned earlier, as security researchers, we should always be asking: **_If someone see this transaction in the mempool, how can they abuse that knowledge?_** There are a few reliable ways to protect against MEV exploits, such as: 1. **Better Design** – Constructing the transaction in a manner that makes it harder for bots to gain useful knowledge. This might involve masking critical information or employing other strategic measures. 2. **Use of Private RPC or Dark Pools** – These are networks that allow transactions to be processed outside of the public mempool. Services such as [**Flashbots Protect**](https://docs.flashbots.net/flashbots-protect/overview), [**MevBlocker**](https://mevblocker.io/), and [**SecureRPC**](https://securerpc.com/) play an essential role in this regard. We should note that Mev is not some mythical concept – it does have real-world consequences on the Ethereum blockchain, and we should be prepared for it.