When, in 2008, Satoshi Nakamoto envisioned the first distributed database management
system that relied on cryptographically secured chain of blocks to store data in an immutable …

Efficient data storage and query processing systems play a vital role in many different
research areas. Blockchain technology and distributed ledgers attract massive attention and …

Dynamic Searchable Symmetric Encryption (DSSE) is a practical cryptographic primitive that
assists servers to provide search and update functionalities in the ciphertext domain. Recent …

Electronic Health Record (EHR) and its privacy have attracted widespread attention with the
development of the healthcare industry in recent years. As locking medical data in a single …

Blockchain has recently gained massive attention thanks to the success of cryptocurrencies
and decentralized applications. With immutability and tamper-resistance features, it can be …

With the emergence of hybrid blockchain database systems, we aim to provide an in-depth
analysis of the performance and trade-offs among a few representative systems. To achieve …

Blockchain databases have attracted widespread attention but suffer from poor scalability
due to underlying non-scalable blockchains. While blockchain sharding is necessary for a …

The emergence of trusted hardwares (such as Intel SGX) provides a new avenue towards
verifiable database. Such trust hardwares act as an additional trust anchor, allowing great …

Abstract Since the Practical Byzantine Fault Tolerance (PBFT) consensus mechanism can
avoid the performance bottleneck of blockchain systems caused by Proof of Work (PoW), it …

Recently, increasing personal data has been stored in blockchain databases, ensuring data
integrity by consensus. Although transparent and immutable blockchains are mainly …