Redactable Blockchain in the Permissionless Setting

Explore a groundbreaking conference talk on redactable blockchain technology in permissionless settings, presented at the 2019 IEEE Symposium on Security & Privacy. Delve into the challenges posed by immutable blockchains, particularly Bitcoin, and their potential to store harmful or illegal data. Discover an innovative solution that allows for efficient data redaction without compromising the blockchain's integrity or relying on heavy cryptographic tools. Learn about the consensus-based voting system, policy-driven redaction process, and the protocol's ability to offer public verifiability and accountability. Examine the formal security definitions, proofs, and a proof-of-concept implementation demonstrating the protocol's minimal overhead compared to immutable blockchains. Gain insights into the potential impact of this technology on law enforcement agencies and the future of blockchain systems.

Intro
What data can this be
Why is this a problem
This clearly is a problem
Our solution
Dropping data
verifying hash links
adversary
Trusted Authority
Similar Solutions
Key Challenges
Our Protocol
Formalism
Properties
Block Header Structure
Request for Reduction
Candidate Pool
Miner Deliberation
Validation
Block Modification
Candidate Block
Deliberation
Public Verification
Questions