如何在发布涉及个人隐私的数据时保证敏感信息不泄露,同时又能最大程度地提高发布数据的效用,是隐私保护中面临的重大挑战。近年来国内外学者对数据发布中的隐私保护(privacy-preserving data publishing,PPDP)进行了大量研究,适时地对...如何在发布涉及个人隐私的数据时保证敏感信息不泄露,同时又能最大程度地提高发布数据的效用,是隐私保护中面临的重大挑战。近年来国内外学者对数据发布中的隐私保护(privacy-preserving data publishing,PPDP)进行了大量研究,适时地对研究成果进行总结,能够明确研究方向。对数据发布领域的隐私保护成果进行了总结,介绍了常用的隐私保护模型和技术、隐私度量标准和算法,重点阐述了PPDP在不同场景中的应用,指出了PPDP可能的研究课题和应用前景。展开更多
In order to preserve privacy in a blockchain ecosystem,the main objective is to keep a transaction's data private,such as the sender,the receiver,and the amount transferred.The current work studies the cryptograph...In order to preserve privacy in a blockchain ecosystem,the main objective is to keep a transaction's data private,such as the sender,the receiver,and the amount transferred.The current work studies the cryptographic tools commonly used to achieve this type of privacy,primarily focusing on the Ethereum blockchain.Such tools usually require many computational and storage resources,leading to additional fees.An anonymous auction protocol was developed as a case study to explore these costs,where hiding the identity and the amount of the bids utilizes a variety of cryptographic primitives.The proposed implementation was compared against three sealed-bid auction protocols,which utilize similar cryptographic tools for preserving privacy throughout the auction process.The results show that providing an additional level of anonymity,such as hiding someone's identity,can increase the gas cost significantly,up to 2.5 times,depending on the choice of the cryptographic tools,which determine the usage of the blockchain's storage and computational resources.By adjusting the level of decentralization on the application level by moving some operations off-chain and maintaining the role of the auctioneer,we show that we can maintain anonymity while reducing the gas cost by 40%.展开更多
文摘如何在发布涉及个人隐私的数据时保证敏感信息不泄露,同时又能最大程度地提高发布数据的效用,是隐私保护中面临的重大挑战。近年来国内外学者对数据发布中的隐私保护(privacy-preserving data publishing,PPDP)进行了大量研究,适时地对研究成果进行总结,能够明确研究方向。对数据发布领域的隐私保护成果进行了总结,介绍了常用的隐私保护模型和技术、隐私度量标准和算法,重点阐述了PPDP在不同场景中的应用,指出了PPDP可能的研究课题和应用前景。
文摘In order to preserve privacy in a blockchain ecosystem,the main objective is to keep a transaction's data private,such as the sender,the receiver,and the amount transferred.The current work studies the cryptographic tools commonly used to achieve this type of privacy,primarily focusing on the Ethereum blockchain.Such tools usually require many computational and storage resources,leading to additional fees.An anonymous auction protocol was developed as a case study to explore these costs,where hiding the identity and the amount of the bids utilizes a variety of cryptographic primitives.The proposed implementation was compared against three sealed-bid auction protocols,which utilize similar cryptographic tools for preserving privacy throughout the auction process.The results show that providing an additional level of anonymity,such as hiding someone's identity,can increase the gas cost significantly,up to 2.5 times,depending on the choice of the cryptographic tools,which determine the usage of the blockchain's storage and computational resources.By adjusting the level of decentralization on the application level by moving some operations off-chain and maintaining the role of the auctioneer,we show that we can maintain anonymity while reducing the gas cost by 40%.
