What is a ZK roll-up?
According to Stroom developer Slava Zhygulin, ZK rollups are transaction hashes or small pieces of information which contain encrypted information about a large database.
By using Zero Knowledge Proofs, users can verify if the information they want to verify is true or false – the information itself does not get stored on chain and can exist in a GitHub repository.
It’s a scalability solution which aims to reduce the amount of data which gets stored on blockchains to make the operations more efficient and reduce the instances where every node must verify every bit of information – they can only agree on the existence of a hash which serves this verification function for anyone who wants to inquire.
ZK rollups are pretty cutting edge in the field of cryptography and there are some plans to implement them on Bitcoin using the ordinals protocol which greatly reduces the cost of storing hashes.
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