Actively Validated Services (AVS) are blockchain-based applications that operate outside the Ethereum Virtual Machine (EVM) and require their own consensus mechanisms for transaction validation, such as sidechains, oracle networks, data availability layers, cross-chain bridges, and virtual machines.

They leverage Ethereum's Proof-of-Stake (PoS) security through a process called re-staking, pioneered by the EigenLayer protocol, allowing validators to secure multiple services simultaneously without needing to establish independent security frameworks.

This shared security model enhances cryptoeconomic security, reduces costs, and fosters innovation by enabling new decentralized services to bootstrap securely.

AVSs are characterized by continuous monitoring and validation by a network of operators, ensuring transaction integrity, security, and compliance, with slashing conditions enforced via smart contracts to deter malicious behaviour.

https://www.dbm.academy/faq for more blockchain vocabulary.

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