• Journal of Information Processing Systems
• /
• 제10권4호
• /
• pp.618-627
• /
• 2014

Nowadays mobile users are using a popular service called Location-Based Services (LBS). LBS is very helpful for a mobile user in finding various Point of Interests (POIs) in their vicinity. To get these services, users must provide their personal information, such as user identity or current location, which severely risks the location privacy of the user. Many researchers are developing schemes that enable a user to use these LBS services anonymously, but these approaches have some limitations (i.e., either the privacy prevention mechanism is weak or the cost of the solution is too much). As such, we are presenting a robust scheme for mobile users that allows them to use LBS anonymously. Our scheme involves a client side application that interacts with an untrusted LBS server to find the nearest POI for a service required by a user. The scheme is not only efficient in its approach, but is also very practical with respect to the computations that are done on a client's resource constrained device. With our scheme, not only can a client anonymously use LBS without any use of a trusted third party, but also a server's database is completely secure from the client. We performed experiments by developing and testing an Android-based client side smartphone application to support our argument.

• The Journal of Society for e-Business Studies
• /
• 제10권4호
• /
• pp.53-81
• /
• 2005

Current DRM system has limitation in protection of user's privacy Therefore, many troubles are expected in service providing if it comes into the ubiquitous times of context-aware environment. HKUST Proposed a watermark-based web service DRM system. However, the relevant study does not consider ubiquitous environment and cannot provide service that considered a context. And privacy protection of a user is impossible. On the other hand, Netherlands Phillips laboratory indicated a privacy problem of a DRM system and they proposed an alternative method about this. However, in relevant study, a Sniffing/Replay attack is possible if communicated authentication information are exposed between a user and device. We designed web services adaptable privacy-aware DRM architecture which supplements these disadvantages. Our architecture can secure user authentication mechanism for sniffing/Replay attack and keep anonymity and protect privacy Therefore , we can implement the privacy-aware considered web service DRM system in Context-Aware environment.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• 제29권12C호
• /
• pp.1729-1738
• /
• 2004

Recently, RFID system have been studied actively in ubiquitous computing as main technology While RFID systems has much advantages, it may create new problems to the user privacy. In this paper, we present a description of previously proposed mechanisms for protecting user's privacy and problems of these. Then, we propose RFID systems providing privacy protection in ubiquitous computing environment. The proposal system as a way of protecting user's privacy from unwanted scanning and tracking by an adversary, but, it can traceable to the tag by authorized administrator when necessary.

• Journal of Korea Society of Digital Industry and Information Management
• /
• 제4권2호
• /
• pp.57-66
• /
• 2008

There have been proposed various copyright protection protocols in network-based digital multimedia distribution framework. However, most of conventional copyright protection protocols are focused on the stability of copyright information embedding/extracting and the access control to data suitable for user's authority but overlooked the privacy of copyright owner and user in authentication process of copyright and access information. In this paper, we propose a solution that builds a privacy-preserving proof of copyright ownership of digital contents in conjunction with keyword search scheme. The appeal of our proposal is three-fold: (1) content providers maintain stable copyright ownership in the distribution of digital contents; (2) the proof process of digital contents ownership is very secure in the view of preserving privacy; (3) the proposed protocol is the copyright protection protocol added by indexing process but is balanced privacy and efficiency concerns for its practical use.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• 제20권6호
• /
• pp.195-208
• /
• 2010

As information communication technologies have highly advanced, a large amount of user sensitive information can be easily collected and unexpectedly distributed. For user-friendly services, a service provider requires and processes more user information. However known privacy protection models take on a passive attitude toward user information protection and often involve serious weaknesses. In reality, information exposure by unauthorised access and mistakenly disclosure occurs frequently. In this paper, we study on the applicability of anonymous authentication services for fine-grained user privacy protection. We analyze authentication schemes and classify them according to the level of privacy newly defined in this paper. In addition, we identify security requirements that a privacy protection scheme based on anonymous authentication can achieve within legal boundary.

• Journal of the Korean Institute of Intelligent Systems
• /
• 제14권7호
• /
• pp.865-870
• /
• 2004

Development of new information and traffic technology causes fast-growing in the field of information-based system. At recent, development of LBS(Location Based Service) makes a remarkable growth of industry as GPS(Global Positioning System) becomes wide-spread and location information becomes more important. However, there is a problem like infringement of privacy when location information is used improperly［1］. In this paper, LBS platform is proposed in order to prevent infringement of privacy. To implement, we classify user path as pattern in a zone of user life. Thereupon, location information is provided according to user' specific situation.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• 제16권6호
• /
• pp.157-161
• /
• 2006

GSM(Global System for Mobile communications) that is the most popular standard for mobile phones, has more than 70% users in the world and the number of users increase continuously. However GSM system has the problem that cannot normally authenticate a user by the exposure of IMSI that is able to uniquely authenticate MS? during the user authentication procedure. In this paper? we provide security enhancement and user privacy by adopting a temporary id and an encryption scheme. Moreover we provide fast user authentication via architecture modification of the conventional GSM user authentication protocol.

• Journal of the Korea Society of Computer and Information
• /
• 제16권11호
• /
• pp.189-200
• /
• 2011

With rapid development and contribution of IT technology IT fushion healthcare service which is a form of future care has been changed a lot. Specially, as IT technology unites with healthcare, because delicate personal medical information is exposed and user's privacy is invaded, we need preperation. In this paper, u-healthcare service model which can manage patient's ID information as user's condition and access level is proposed to protect user's privacy. The proposed model is distinguished by identification, certification of hospital, access control of medical record, and diagnosis of patient to utilize it efficiently in real life. Also, it prevents leak of medical record and invasion of privacy by others by adapting user's ID as divided by user's security level and authority to protect privacy on user's information shared by hospitals.

• Journal of Korean Library and Information Science Society
• /
• 제43권3호
• /
• pp.353-384
• /
• 2012

This study was conducted on the observation that the filter bubble and privacy violation problems are related to the personalized services provided by libraries. This study discussed whether there is the possibility for invasion of privacy when libraries provide services utilizing state-of-the-art technology, such as location-based services, context aware services, RFID-based services, Cloud Services, and book recommendation services. In addition, this study discussed the following three aspects: whether or not users give up their right to privacy when they provide personal information for online services, whether or not there are discussions about users' privacy in domestic libraries, and what kind of risks the filter bubble problem can cause library users and what are possible solutions. This study represents early-stage research on library privacy in Korea, and can be used as basic data for privacy research.

• Proceedings of the Korea Information Processing Society Conference
• /
• 한국정보처리학회 2013년도 춘계학술발표대회
• /
• pp.636-639
• /
• 2013

With the development and rapid growth of cloud computing, lots of application services based on cloud computing have been developed. In addition, cloud-based DRM systems have been developed to support those services' copyright and privacy protection. In this paper, we propose a new cloud-based user-friendly DRM system, which allows users to execute the same contents bought at most n times at any devices with license enforcement, which checks the validation of licenses before every execution, having no smart card, which has to carry a smart card reader that seems troublesome to a user, and providing the copyright and privacy protection.