Privacy preservation in location based services (LBS) has received extensive attention in recent years. One of the less explored problems in this domain is associated with services that rely on continuous updates from the mobile object. Cloaking algorithms designed to hide user locations in single requests perform poorly in this scenario. The historical k-anonymity property is therefore enforce...

We say that an encryption scheme or a signature scheme provides anonymity when it is infeasible to determine which user generated a ciphertext or a signature. To construct the schemes with anonymity, it is necessary that the space of ciphertexts or signatures is common to each user. In this paper, we focus on the techniques which can be used to obtain this anonymity property, and propose a new ...

Due to recent happenings in the world, such as the implementation of Internet laws, network anonymity has become a highly controversial subject. This report is a brief inventory of technologies and reasons for anonymity, and is based on literature studies and some basic testing through existing tests. It also covers whether or not anonymous networks truly are anonymous and how difficult it is t...

It is often very expensive and practically infeasible to generate test cases that can exercise all possible program states in a program. This is especially true for a medium or large industrial system. In practice, industrial clients of the system often have a set of input data collected either before the system is built or after the deployment of a previous version of the system. Such data are...

In this paper, we introduce an efficient anonymous authentication protocol in Vehicular Ad-hoc Networks (VANETs) [5] to resolve the issue on anonymous authentication for communication between roadside units and vehicles. Our proposed protocol cannot only guarantee privacy, anonymity, and other basic cryptographic requirements but also provide traceability of illegal users. Our proposed protocol...

To usefully query a location-based service, a mobile device must typically present its own location in its query to the server. This may not be acceptable to clients that wish to protect the privacy of their location. This paper presents the design and implementation of SybilQuery, a fully decentralized and autonomous k-anonymity-based scheme to privately query location-based services. SybilQue...

Anonymization of published microdata has become a very important topic nowadays. The major difficulty is to publish data of individuals in a manner that the released table both provides enough information to the public and prevents disclosure of sensitive information. Therefore, several authors proposed definitions of privacy to get anonymous microdata. One definition is called k-Anonymity and ...

a r t i c l e i n f o Identity disclosure is one of the most serious privacy concerns in today's information age. A well-known method for protecting identity disclosure is k-anonymity. A dataset provides k-anonymity protection if the information for each individual in the dataset cannot be distinguished from at least k − 1 individuals whose information also appears in the dataset. There is a fl...

BACKGROUND Explicit patient consent requirements in privacy laws can have a negative impact on health research, leading to selection bias and reduced recruitment. Often legislative requirements to obtain consent are waived if the information collected or disclosed is de-identified. OBJECTIVE The authors developed and empirically evaluated a new globally optimal de-identification algorithm tha...

Private retrieval of public data is useful when a client wants to query a public data service without revealing the specific query data to the server. Computational Private Information Retrieval (cPIR) is able to achieve complete privacy for a client, but is deemed impractical since it involves expensive computation on all the data on the server. Besides, it is inflexible if the server wants to...