In this paper we address the issue of identity and access control within shared permissioned
blockchains. We propose the ChainAchor system that provides anonymous but verifiable …

In this paper, we propose a framework named AttriChain that supports transactions with
anonymous sender identity and threshold traceability in permissioned blockchain. AttriChain …

In this paper we address the issue of retaining user anonymity within a permissioned
blockchain. We present the ChainAnchor architecture that adds an identity and privacy …

The immutability of blockchains is critical for cryptocurrencies, but an imperative need arises
for the redaction of on-chain data due to privacy-protecting laws like GPDR. Recently …

Blockchains are distributed systems that allow mutually distrusting parties to process
transactions in a censorship-resistant way while establishing an immutable transaction …

The blockchain structure can be utilized in an efficient way to verify and ensure the integrity
of the data and prevent historical transactions from tampering, such that if one block is …

In permissioned blockchain systems, participants are admitted to the network by receiving a
credential from a certification authority. Each transaction processed by the network is …

Blockchain technology has emerged as a compelling field of study over the past decade.
Nevertheless, certain blockchain-based protocols, particularly those reliant on permissioned …

Recently, public and permissionless blockchains such as Bitcoin and Ethereum have been
facing a formidable challenge in the form of scalability which has hindered their expected …

The immutability of blockchain means that data in blockchain cannot be modified once
confirmed. It guarantees the reliability and integrity of blockchain. However, absolute …