The xDai Stable Chain is protected by a select group of validators well known in the Ethereum space. For a complete and updated list, visit https://validators.poa.network/poa-dapps-validators. Make sure your web3 interface (ie MetaMask, Nifty Wallet) is set to the xDai chain (RPC URL = https://dai.poa.network, network ID = 100)
To learn more about the Validators, visit our forum section where validators introduce themselves and explain why they want to validate the chain.
When xDai switches to dPOS, anyone with enough STAKE and the ability to run a node can become a candidate. Candidates will be eligible to become validators in the new model.