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Since 2016, sharding has become an auspicious solution to tackle the scalability issue in legacy blockchain systems. Despite its potential to strongly boost the blockchain throughput, sharding comes with its own security issues. To ease the…

密码学与安全 · 计算机科学 2024-06-05 Truc Nguyen , My T. Thai

The adoption of decentralized, tamper-proof ledger systems is paving the way for new applications and opportunities in different contexts. While most research aims to improve their scalability, privacy, and governance issues,…

分布式、并行与集群计算 · 计算机科学 2023-05-29 Ivan Homoliak , Martin Perešíni , Patrik Holop , Jakub Handzuš , Fran Casino

Sharding is a promising blockchain scaling solution. But it currently suffers from high latency and low throughput when it comes to cross-shard transactions, i.e., transactions that require coordination from multiple shards. The root cause…

密码学与安全 · 计算机科学 2021-02-01 Sourav Das , Vinith Krishnan , Ling Ren

Applications of blockchain technologies got a lot of attention in recent years. They exceed beyond exchanging value and being a substitute for fiat money and traditional banking system. Nevertheless, being able to exchange value on a…

密码学与安全 · 计算机科学 2019-08-22 Michal Ostapowicz , Kamil Żbikowski

The maturing of blockchain technology leads to heterogeneity, where multiple solutions specialize in a particular use case. While the development of different blockchain networks shows great potential for blockchains, the isolated networks…

分布式、并行与集群计算 · 计算机科学 2021-02-01 Sara Ghaemi , Sara Rouhani , Rafael Belchior , Rui S. Cruz , Hamzeh Khazaei , Petr Musilek

Existing blockchain systems scale poorly because of their distributed consensus protocols. Current attempts at improving blockchain scalability are limited to cryptocurrency. Scaling blockchain systems under general workloads (i.e.,…

分布式、并行与集群计算 · 计算机科学 2019-03-13 Hung Dang , Tien Tuan Anh Dinh , Dumitrel Loghin , Ee-Chien Chang , Qian Lin , Beng Chin Ooi

Nowadays, sharding is deemed as a promising way to save traditional blockchain protocols from their low scalability. However, such technique also brings several potential risks and huge communication overheads. An improper design may give…

密码学与安全 · 计算机科学 2022-01-03 Mengqian Zhang , Jichen Li , Zhaohua Chen , Hongyin Chen , Xiaotie Deng

Blockchain based cryptocurrencies are usually unmanaged, distributed, consensus-based systems in which no single entity has control. Managed cryptocurrencies can be implemented using private blockchains but are fundamentally different as…

密码学与安全 · 计算机科学 2019-06-27 Peter Mell

In order to fully unlock the transformative power of distributed ledgers and blockchains, it is crucial to develop innovative consensus algorithms that can overcome the obstacles of security, scalability, and interoperability, which…

分布式、并行与集群计算 · 计算机科学 2023-10-16 Amirhossein Taherpour , Xiaodong Wang

Computer-Aided Diagnosis (CAD) systems have emerged to support clinicians in interpreting medical images. CAD systems are traditionally combined with artificial intelligence (AI), computer vision, and data augmentation to evaluate…

密码学与安全 · 计算机科学 2020-06-23 Mayra Samaniego , Sara Hosseinzadeh Kassani , Cristian Espana , Ralph Deters

As an append-only distributed database, blockchain is utilized in a vast variety of applications including the cryptocurrency and Internet-of-Things (IoT). The existing blockchain solutions show downsides in communication and storage…

分布式、并行与集群计算 · 计算机科学 2021-09-02 Yahya Hassanzadeh-Nazarabadi , Alptekin Küpçü , Öznur Özkasap

We previously proposed a cross-referencing method for enabling multiple peer-to-peer network domains to manage their own public blockchains and periodically exchanging the state of the latest fixed block in the blockchain with hysteresis…

分布式、并行与集群计算 · 计算机科学 2023-04-14 Takaaki Yanagihara , Akihiro Fujihara

University education play a critical role in shaping intellectual and professional development of the individuals and contribute significantly to the advancement of knowledge and society. Generally, university authority has a direct control…

密码学与安全 · 计算机科学 2024-06-11 Md. Ahsan Habib , Md. Mostafijur Rahman , Nieb Hasan Neom

Strategies related to the blockchain concept of Extractable Value (MEV/BEV), such as arbitrage, front-, or back-running create strong economic incentives for network nodes to reduce latency. Modified nodes, that minimize transaction…

密码学与安全 · 计算机科学 2025-02-10 Taro Tsuchiya , Liyi Zhou , Kaihua Qin , Arthur Gervais , Nicolas Christin

Writing novels or drawing cartoons is a prolonged and interesting process that needs imagination and a lot of rethinking and rewriting. Blockchain systems has a very strong feature that tampering is not allowed for the system. In order to…

密码学与安全 · 计算机科学 2023-12-08 Hao Wang

The development of blockchain applications increased the demand for blockchain performance. Among the attempts of many blockchain scale-out solutions, sharding can improve performance and reduce the storage requirements of each node.…

分布式、并行与集群计算 · 计算机科学 2022-07-08 Jia Kan , Jie Zhang , Xin Huang

Sharding is the prevalent approach to breaking the trilemma of simultaneously achieving decentralization, security, and scalability in traditional blockchain systems, which are implemented as replicated state machines relying on atomic…

密码学与安全 · 计算机科学 2021-03-01 Yizhong Liu , Jianwei Liu , Marcos Antonio Vaz Salles , Zongyang Zhang , Tong Li , Bin Hu , Fritz Henglein , Rongxing Lu

The Committee Selection Mechanism can select multiple users of blockchain network to execute a consensus algorithm, such as PBFT. In order to guarantee two properties, the mathematical form of the mechanism is relatively limited. Further,…

分布式、并行与集群计算 · 计算机科学 2019-05-14 Shiyu Cai

For preserving privacy, blockchains can be equipped with dedicated mechanisms to anonymize participants. However, these mechanism often take only the abstraction layer of blockchains into account whereas observations of the underlying…

网络与互联网体系结构 · 计算机科学 2018-07-31 David Mödinger , Henning Kopp , Frank Kargl , Franz J. Hauck

In this paper, we present CCEdit, a versatile generative video editing framework based on diffusion models. Our approach employs a novel trident network structure that separates structure and appearance control, ensuring precise and…

计算机视觉与模式识别 · 计算机科学 2024-04-09 Ruoyu Feng , Wenming Weng , Yanhui Wang , Yuhui Yuan , Jianmin Bao , Chong Luo , Zhibo Chen , Baining Guo