典型文献
Differential Privacy via a Truncated and Normalized Laplace Mechanism
文献摘要：
When querying databases containing sensitive information,the privacy of individuals stored in the database has to be guaranteed.Such guarantees are provided by differentially private mechanisms which add controlled noise to the query responses.However most such mechanisms do not take into consideration the valid range of the query being posed.Thus,noisy responses that fall outside of this range may potentially be produced.To rectify this and therefore improve the utility of the mechanism,the commonly-used Laplace distribution can be truncated to the valid range of the query and then normalized.However,such a data-dependent operation of normalization leaks additional information about the true query response,thereby violating the differential privacy guarantee.Here,we propose a new method which preserves the differential privacy guarantee through a careful determination of an appropriate scaling parameter for the Laplace distribution.We adapt the privacy guarantee in the context of the Laplace distribution to account for data-dependent normalization factors and study this guarantee for different classes of range constraint configurations.We provide derivations of the optimal scaling parameter(i.e.,the minimal value that preserves differential privacy)for each class or provide an approximation thereof.As a result of this work,one can use the Laplace distribution to answer queries in a range-adherent and differentially private manner.To demonstrate the benefits of our proposed method of normalization,we present an experimental comparison against other range-adherent mechanisms.We show that our proposed approach is able to provide improved utility over the alternative mechanisms.
文献关键词：
中图分类号：
作者姓名：
William Croft;J?rg-Rüdiger Sack;Wei Shi
作者机构：
School of Computer Science,Carleton University,Ottawa K1S 5B6,Canada;School of Information Technology,Carleton University,Ottawa K1S 5B6,Canada
文献出处：
引用格式：
[1]William Croft;J?rg-Rüdiger Sack;Wei Shi-.Differential Privacy via a Truncated and Normalized Laplace Mechanism)[J].计算机科学技术学报（英文版）,2022(02):369-388
A类：
B类：
Differential,Privacy,via,Truncated,Normalized,Laplace,Mechanism,When,querying,databases,containing,sensitive,information,privacy,individuals,stored,has,guaranteed,Such,guarantees,provided,differentially,private,mechanisms,which,controlled,noise,responses,However,most,such,do,not,take,into,consideration,valid,range,being,Thus,noisy,that,fall,outside,this,may,potentially,produced,To,rectify,therefore,utility,commonly,used,distribution,can,truncated,then,normalized,dependent,operation,normalization,leaks,additional,about,true,thereby,violating,Here,new,method,preserves,through,careful,determination,appropriate,scaling,parameter,We,adapt,context,account,factors,study,classes,constraint,configurations,derivations,optimal,minimal,value,each,approximation,thereof,result,work,one,answer,queries,adherent,manner,demonstrate,benefits,our,proposed,present,experimental,comparison,against,other,show,approach,able,improved,over,alternative
AB值：
0.534412
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
