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1. Accountable-Blockchain-Rewriting Accountable-Blockchain-Rewriting Public

   This is the implementation of the policy-based chameleon hash function with black-box accountability PCHBA. We use PCHBA to secure blockchain rewriting, such that trapdoor holder may maliciously re…

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2. rewritableBlockchain rewritableBlockchain Public

   using java implements an immutable blockchain system that mimics basic functionalities of blockchain system, and a rewritable blockchain. Both of them are based on Proof of Work (PoW) consensus.

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3. remote-user-authentication-framework remote-user-authentication-framework Public

   We simulate a user authentication from multiple biometircs in Python. To simulate it, we need an attribute based encryption ABE (FAME: Fast Attribute-based Message Encryption, CCS17), and a fuzzy e…

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4. Strong-Accountable-PCH Strong-Accountable-PCH Public

   This is the source code for StrongPCH.

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5. Accountable-Fine-Grained-Blockchain-Rewriting-in-the-Permissionless-Setting Accountable-Fine-Grained-Blockchain-Rewriting-in-the-Permissionless-Setting Public

   Full paper and supplemental materials

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6. Presentation-for-interview Presentation-for-interview Public