What is Restaking (EigenLayer)

Restaking is a cryptoeconomic innovation introduced by EigenLayer that allows Ethereum validators and liquid staking token holders to "restake" their staked ETH — pledging the same collateral to secure additional protocols (called Actively Validated Services or AVS) beyond Ethereum itself. Restaking extends Ethereum's economic security to new applications while earning stakers additional yield. THE PROBLEM RESTAKING SOLVES Every new decentralised protocol (data availability layers, oracle networks, cross-chain bridges, sequencers) needs its own security — typically bootstrapping a new validator set with its own token. This is expensive, slow, and creates a fragmented security landscape where each new protocol starts with minimal economic stake. EigenLayer allows these protocols to rent Ethereum's existing security instead. HOW EIGENLAYER RESTAKING WORKS ETH stakers or LST (liquid staking token) holders can opt into EigenLayer's smart contracts. By restaking, they pledge their collateral to secure additional AVS (Actively Validated Services) beyond Ethereum itself. In exchange, they earn AVS-specific rewards on top of regular ETH staking yields. Operators run the specialised software required by each AVS and accept delegated restake from stakers. ACTIVELY VALIDATED SERVICES (AVS) EXAMPLES Data availability layers (EigenDA — EigenLayer's own high-throughput data availability service). Oracle networks providing data to dApps. Bridges verifying cross-chain message authenticity. Decentralised sequencers for rollups. Shared cryptographic services (random number generation, threshold key management). RESTAKING RISKS Slashing amplification: A validator running multiple AVS simultaneously could face slashing from multiple sources for a single failure — potentially losing far more than their original Ethereum stake. AVS risk stacking: Each additional AVS adds smart contract and operational risk. Centralisation: Large liquid staking protocols restaking significant ETH could dominate AVS security sets. EIGEN TOKEN EIGEN is EigenLayer's governance and staking token, distributed via an airdrop to early restakers. It is used in a novel "universal slashable stake" model for intersubjective faults (actions that are harmful but not provable on-chain).

Terms in addition to the Restaking (EigenLayer)

Blockchain

A blockchain is a subset of a distributed database. The Bitcoin inventors originally prototyped the system in 2008. This modern database is made up of separate blocks that are connected together in a chronological chain. Blockchains may be used to store a wide range of data types. It has mostly been utilized as a public ledger for bitcoin transactions to date. A peer-to-peer network comprised of independent nodes uses a consensus process to ensure the blockchain's security and legitimacy. Each node in the network keeps a public and immutable copy of the data.

2 Factor Authentication (2FA)

2 Factor Authentication is a security measure with two layers. It is used by the majority of cryptocurrency exchanges. To log in, you must provide not only a password, but also a code obtained, for example, from the Google authenticator.

Airdrop

An airdrop is a method of distributing coins. End users can typically obtain coins for free or in exchange for doing a small task, such as subscribing to a newsletter, sending a tweet, or inviting others via a personal affiliate link. Cryptocurrency airdrops — the act of depositing cryptocurrency into public crypto wallets — are utilized as a marketing, liquidity creation, and network bootstrapping technique for many different types of blockchain initiatives.

Altcoin

Altcoin - "alternative coin" - is any kind of digital currency other than Bitcoin. Since the launch of Bitcoin, the world's first digital currency, many altcoins (as well as supporting blockchains) have been created. Altcoin digital currencies share many similarities to Bitcoin, but consistently and have significant differences. There are about 20,000 altcoins, and this number is expected to grow significantly in the coming years. Altcoins often develop Bitcoin features. Ethereum, currently the most widely used blockchain, supports digital contracts and separate applications where Bitcoin does not. Altcoins are also often created to cater to the needs of different users. The Litecoin blockchain, for example, can process payments quarterly for the duration of Bitcoin.

Cold Storage

Cold storage is the way to store cryptocurrency offline. The word refers to the use of offline wallets that are not connected to the internet. Cold storage is the most secure way to keep cryptocurrencies since an offline currency becomes less likely to be hacked and stolen. Paper wallets, printed renditions of private keys, and offline hardware and software wallets are all examples of cold storage.