Polygon, an Ethereum layer-2 scaling solution, is shifting its focus to zero-knowledge (ZK) technology. The co-founder of Polygon, Jordi Baylina, believes that ZK proofs are the future due to their fast finality and withdrawal times. However, moving to a validum model means that validums do not inherit Ethereum security, making them more suitable for applications like gaming and social media rather than DeFi. Additionally, Polygon has recently released the Polygon chain development kit (CDK), which allows developers to launch their own ZK layer-2s. The CDK provides access to shared liquidity through the ZK bridge and interoperability layer. Polygon CDK gives developers the option to choose between a blockchain that uses the validum framework or an app-specific zkEVM blockchain.

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