Towards Data Redaction in Bitcoin

A major issue for many applications of blockchain technology is the tension between immutability and compliance to regulations. For instance, GDPR in EU requires guarantee, under some circumstances, right be forgotten. This could imply that at point one might forced delete data from a locally stored blockchain, therefore irreparably hurting security transparency such decentralized platforms. Motivated by protection consistency issues, this work we design implement mechanism securely deleting Bitcoin blockchain. We use zero-knowledge proofs allow any node transactions, still preserving public verifiability correctness spent spendable coins. Moreover, specifically STARK exploit they provide. Our solution, unlike previous approaches, avoids complications asking nodes reach consensus on content delete. In particular, our allows every specific without coordinating decision with others. implementation, removal can performed (resp., verified) minutes seconds) standard laptop rather than days as required designs based consensus.