Polygon has announced a significant privacy upgrade to its Polygon CDK, incorporating a Validium configuration based on the Succinct SP1 Hypercube zero-knowledge proof system. This enhancement allows institutions to keep original transaction data on their infrastructure while submitting encrypted commitments and zero-knowledge proofs to Ethereum. The upgrade facilitates "private data, public verification" and maintains liquidity interoperability with Ethereum and other chains via AggLayer. The upgrade introduces five composable privacy levels, including permissioned access, Validium chains, Trusted Execution Environments, Fully Homomorphic Encryption tokens, and client-side zero-knowledge private transactions. It also supports integration with enterprise identity systems like Okta and Azure AD, targeting traditional financial institutions such as banks, payment companies, and asset management firms planning to transition on-chain.