# Proposer Builder Separation ⎊ Area ⎊ Resource 2

---

## What is the Control of Proposer Builder Separation?

Proposer Builder Separation introduces a governance and operational control split where the entity responsible for proposing a block cannot unilaterally determine its internal transaction composition. This separation is a deliberate design choice to decentralize the power over transaction ordering and block finalization. Such a control mechanism is intended to prevent collusion and censorship at the consensus layer.

## What is the Security of Proposer Builder Separation?

The architectural separation enhances protocol security by making it economically infeasible for a single proposer to capture all MEV without external coordination with a builder. This design reduces the attack surface for centralized manipulation of the transaction sequence. Maintaining this separation is crucial for the long-term resilience of the network's integrity.

## What is the Mechanism of Proposer Builder Separation?

This structural change mandates a specific interaction mechanism where builders submit fully formed, encrypted blocks to proposers, who then select the highest-bidding block. The separation fundamentally restructures the MEV extraction pipeline, moving the optimization function away from the consensus validator. Understanding this new mechanism is key to modeling post-merge execution flow.


---

## [Transaction Fee Risk](https://term.greeks.live/term/transaction-fee-risk/)

## [Priority Fee Bidding Wars](https://term.greeks.live/term/priority-fee-bidding-wars/)

## [Transaction Priority](https://term.greeks.live/term/transaction-priority/)

## [Priority Fee Auction](https://term.greeks.live/term/priority-fee-auction/)

## [Block Space Allocation](https://term.greeks.live/term/block-space-allocation/)

## [Gas Fee Manipulation](https://term.greeks.live/term/gas-fee-manipulation/)

## [Priority Fees](https://term.greeks.live/term/priority-fees/)

## [MEV Exploitation](https://term.greeks.live/term/mev-exploitation/)

## [MEV Mitigation Strategies](https://term.greeks.live/term/mev-mitigation-strategies/)

## [Sequencer Economics](https://term.greeks.live/term/sequencer-economics/)

## [Optimistic Rollup Security](https://term.greeks.live/term/optimistic-rollup-security/)

## [Block Builder](https://term.greeks.live/term/block-builder/)

## [Shared Sequencers](https://term.greeks.live/term/shared-sequencers/)

## [Gas Fee Auctions](https://term.greeks.live/term/gas-fee-auctions/)

## [Gas Fee Bidding](https://term.greeks.live/term/gas-fee-bidding/)

## [Fee Market Equilibrium](https://term.greeks.live/term/fee-market-equilibrium/)

## [Block Space Auctions](https://term.greeks.live/term/block-space-auctions/)

## [Priority Fee Dynamics](https://term.greeks.live/term/priority-fee-dynamics/)

## [Front-Running Vulnerabilities](https://term.greeks.live/term/front-running-vulnerabilities/)

## [EIP-1559 Base Fee Dynamics](https://term.greeks.live/term/eip-1559-base-fee-dynamics/)

## [MEV Liquidation](https://term.greeks.live/term/mev-liquidation/)

## [Block Latency](https://term.greeks.live/term/block-latency/)

## [MEV Resistance](https://term.greeks.live/term/mev-resistance/)

## [Priority Gas Auctions](https://term.greeks.live/term/priority-gas-auctions/)

## [Mempool Dynamics](https://term.greeks.live/term/mempool-dynamics/)

## [Private Mempools](https://term.greeks.live/term/private-mempools/)

## [Market Adversarial Environments](https://term.greeks.live/term/market-adversarial-environments/)

## [Block Builders](https://term.greeks.live/term/block-builders/)

## [PBS](https://term.greeks.live/term/pbs/)

## [Mempool](https://term.greeks.live/term/mempool/)

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---

**Original URL:** https://term.greeks.live/area/proposer-builder-separation/resource/2/