June 06, 2023
Zero-knowledge (Zk) rollups are a layer 2 scaling solution that increases throughput on Ethereum by moving computation and state storage off-chain.
It can process thousands of transactions in a batch and then post minimal summary data to Mainnet.
The technology behind zk-rollups relies on zero-knowledge proofs, a cryptographic technique that allows one party to prove the validity of a statement without revealing any additional information.
Zero-knowledge proofs are a way of proving that something is true without revealing any information about it. The "zero-knowledge" part of the name refers to the fact that the proof does not reveal any information beyond the statement's validity.But how?
Alibaba Example | Interactive ZKP
Suppose you want to prove to your friend that you know the magic word to open a secret door in a cave. The cave has two entrances, A and B, that lead to the same point where the secret door is located. You can only open the door inside the cave by saying the magic word. You don't want to tell your friend the magic word or show him the door.
A zero-knowledge proof method for this problem would be like this:
Zero-knowledge proofs are useful for preserving privacy and security in many applications, such as authentication, cryptography, blockchain, and more.
There are different types of zero-knowledge proofs, such as interactive and non-interactive. Interactive zero-knowledge proofs require communication between the prover and the verifier, while non-interactive ones do not. The above scenario of Alibab cave is an example of interactive ZKP.
Non-interactive zero-knowledge proofs are more efficient and convenient, but they rely on stronger assumptions and more complex techniques.
|A user-centric zk Rollup platform that’s already active on the mainnet
|A Layer-2 DEX with the AMM model based on zero knowledge rollups
|A protocol for users and developers that uses ZK Rollup solutions to produce zero-knowledge proofs
|An open-source zero knowledge rollup that is optimised for Ethereum token transfers that are secure, low-cost, and usable
|An open-source platform where users can create secure, scalable and private decentralised applications
|A Layer 2 that enables highly efficient, low-cost trading and transactions on Ethereum
In summary, zk-rollups are a promising Layer-2 scalability solution that leverages zero-knowledge proofs to bundle multiple transactions into a single proof, increasing transaction throughput and reducing gas fees. While they offer several advantages, their complexity, and limited support may pose challenges to widespread adoption.
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