SaTC: CORE: Small: Blockchain-based Mechanisms for Timed Data Release and Timed Transactions

SaTC：核心：小型：基于区块链的定时数据发布和定时交易机制

• 批准号: 2020071
• 负责人: Balaji Palanisamy
• 金额: $ 44.25万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-10-01 至 2025-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2020071&HistoricalAwards=false
• 关键词: SaTC; CORE; Small; Blockchain; based

Timed release of data is a classical problem. Timed data release ensures that data remains secure and undiscovered until a prescribed release time and gets automatically released at the release time. Examples of applications requiring timed data release include secure auction systems (bidding information needs protection until all bids arrive), copyrights-aware data publishing (data is automatically released when the copyright expires) and secure voting mechanisms (votes are not allowed to be accessed until the end of the polling process). This project develops a highly decentralized solution for supporting timed release of data using Blockchain-based smart contracts that provide guaranteed protection against adversarial attacks on obtaining access to the data before the release time. This research also augments the timed data release techniques with mechanisms for decentralized timed transactions that enable scheduling of transaction functions without revealing the function inputs prior to the execution time. The project aims to produce the techniques, algorithms, design and implementation to enable timed release of data and timed execution in decentralized blockchain platforms. Research results from the project will be integrated into the security track courses at the University of Pittsburgh. The project will engage the security track students in the proposed research and development activities. New teaching modules related to blockchain-based decentralized application development will be incorporated as introductory modules for high school students. The project takes a transformational step towards building next generation decentralized infrastructures for supporting timed data release and timed execution of transactions that do not involve a single point of trust. A key aspect to this model is a suite of novel secure data management techniques that allows data to be published at a future time point without a single point of trust (i.e., the data becomes available at the release time and prior to the release time, it remains undiscovered and unavailable). The timed-release mechanisms route the protected data within the timed data release system in a deterministically pseudo-random manner, enabling it to automatically appear at the release time. The proposed techniques use a monetary incentive mechanism enforced by the blockchain to reward honest peers and penalize violators of the protocol. The mechanisms are designed to protect against both rational and malicious peers in the system. A key objective of the system design is to minimize the gas cost of executing the timed data release and timed execution protocols while maintaining high scalability and availability. The project demonstrates the use of timed data release and timed execution features by developing a suite of decentralized applications using the proposed techniques. The project implements the mechanisms using the contract-oriented programming language, Solidity and evaluates the techniques on the Rinkeby Ethereum test network.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

数据的定时发布是一个经典问题。定时数据发布可确保数据在规定的发布时间之前保持安全且未被发现，并在发布时间自动发布。需要定时数据发布的应用程序的例子包括安全拍卖系统（投标信息需要保护，直到所有投标到达），版权意识的数据发布（数据自动发布时，版权到期）和安全投票机制（投票不允许访问，直到投票过程结束）。该项目开发了一个高度分散的解决方案，用于支持使用基于区块链的智能合约的数据定时发布，该智能合约在发布时间之前获得对数据的访问权限时提供有保证的保护，以防止对抗性攻击。这项研究还增强了定时数据发布技术与机制，分散的定时事务，使调度的事务功能，而不透露的功能输入之前的执行时间。该项目旨在开发技术、算法、设计和实施，以实现分散式区块链平台中的数据定时发布和定时执行。该项目的研究成果将纳入匹兹堡大学的安全轨道课程。该项目将使安全轨道的学生参与拟议的研究和开发活动。与基于区块链的去中心化应用程序开发相关的新教学模块将作为高中生的入门模块。 该项目朝着构建下一代去中心化基础设施迈出了变革性的一步，以支持定时数据发布和定时执行不涉及单点信任的交易。该模型的一个关键方面是一套新颖的安全数据管理技术，该技术允许在未来的时间点发布数据，而无需单个信任点（即，数据在释放时间变得可用，并且在释放时间之前，它保持未被发现和不可用）。定时释放机制以确定性伪随机方式在定时数据释放系统内路由受保护数据，使其能够在释放时间自动出现。所提出的技术使用由区块链强制执行的货币激励机制来奖励诚实的同行并惩罚违反协议的人。这些机制旨在防止系统中的理性和恶意对等体。系统设计的一个关键目标是最小化执行定时数据发布和定时执行协议的gas成本，同时保持高的可扩展性和可用性。该项目通过使用所提出的技术开发一套分散的应用程序来演示定时数据发布和定时执行功能的使用。该项目使用面向合约的编程语言Solidity实现了这些机制，并在Rinkeby以太坊测试网络上对这些技术进行了评估。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

CTDRB: Controllable Timed Data Release Using Blockchains

CTDRB：使用区块链的可控定时数据发布

• 发表时间: 2023
• 期刊: Cham
• 作者: Jingzhe Wang;Balaji Palanisamy
• 通讯作者: Balaji Palanisamy

SilentDelivery: Practical Timed-Delivery of Private Information Using Smart Contracts

• DOI: 10.1109/tsc.2021.3098858
• 发表时间: 2019-12
• 期刊: IEEE Transactions on Services Computing
• 影响因子: 8.1
• 作者: Chao Li;Balaji Palanisamy

Attack-Resilient Blockchain-Based Decentralized Timed Data Release

基于区块链的抗攻击去中心化定时数据发布

• DOI: 10.1007/978-3-031-10684-2_8
• 发表时间: 2022
• 期刊: 36th Annual IFIP WG11.3 Conference on Data and Applications Security and Privacy (DBSec 2022
• 作者: Wang, Jingzhe;Palanisamy, Balaji
• 通讯作者: Palanisamy, Balaji

Protecting Blockchain-based Decentralized Timed release of Data from Malicious Adversaries

保护基于区块链的去中心化定时发布数据免受恶意对手的侵害

• DOI: 10.1109/icbc54727.2022.9805506
• 发表时间: 2022
• 期刊: 2022 IEEE International Conference on Blockchain and Cryptocurrency (ICBC
• 作者: Wang, Jingzhe;Palanisamy, Balaji
• 通讯作者: Palanisamy, Balaji