2m
Validium is a blockchain scaling solution that processes transactions and stores data off-chain to improve the throughput of the mainnet.
What is scaling? How does it work? Please refer to the content: What is Layer 2
In other words, it takes the execution and data availability layers of a layer 1 blockchain off-chain. Validium takes advantage of validity proofs to guarantee the integrity of off-chain transactions, which is the same as zero-knowledge roll-ups.
What does “zero-knowledge” mean? Please refer to the content: What is Zero-Knowledge Proof
However, zero-knowledge roll-ups post compressed transaction data on the mainnet, while Validium stores transaction data off-chain with a data provider to further reduce cost and improve performance.
Validium only relies on layer 1 for settlement and consensus. Immutable X is an example of a Validium. Arbitrum Nova also takes execution and data availability off-chain. But it does not use validity proofs, so it is technically not a Validium.
You might also be interested in the following information:
APP
5054