• Title/Summary/Keyword: Privacy Weight

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Design of Dynamic Location Privacy Protection Scheme Based an CS-RBAC (CS-RBAC 기반의 동적 Location Privacy 보호 구조 설계)

  • Song You-Jin;Han Seoung-Hyun;Lee Dong-Hyeok
    • The KIPS Transactions:PartC
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    • v.13C no.4 s.107
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    • pp.415-426
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    • 2006
  • The essential characteristic of ubiquitous is context-awareness, and that means ubiquitous computing can automatically process the data that change according to space and time, without users' intervention. However, in circumstance of context awareness, since location information is able to be collected without users' clear approval, users cannot control their location information completely. These problems can cause privacy issue when users access their location information. Therefore, it is important to construct the location information system, which decides to release the information considering privacy under the condition such as location, users' situation, and people who demand information. Therefore, in order to intercept an outflow information and provide securely location-based information, this paper suggests a new system based CS-RBAC with the existing LBS, which responds sensitively as customer's situation. Moreover, it accommodates a merit of PCP reflecting user's preference constructively. Also, through privacy weight, it makes information not only decide to providing information, but endow 'grade'. By this method, users' data can be protected safely with foundation of 'Role' in context-aware circumstance.

New Secret Sharing Scheme for Privacy Data Management

  • Song You-Jin;Lee Dong-Hyeok
    • Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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    • 2006.06a
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    • pp.765-773
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    • 2006
  • In ubiquitous environment, private enterprise or public institution's privacy data are sometimes exposed to hackers because of the lack of the sense of information security. We apply secret sharing scheme to solve the privacy problems. But, the existing secret sharing scheme are not suitable for the management of large a quantity of data because that required operation of large capacity. In this paper, We propose new secret sharing scheme for privacy data management. Our scheme makes high-speed operation possible, and it also allows for set weight for each secret pieces depending on weight of participants. The scheme proposed in this paper makes it efficient to collect and manage secure privacy data in ubiquitous environment.

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Analyses of Security and Privacy Issues in Ultra-weight RFID Protocol

  • Kim, Jung-Tae
    • Journal of information and communication convergence engineering
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    • v.9 no.4
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    • pp.441-446
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    • 2011
  • Radio frequency identification (RFID) tags are cheap and simple devices that can store unique identification information and perform simple computation to keep better inventory of packages. Security protocol for RFID tags is needed to ensure privacy and authentication between each tag and their reader. In order to accomplish this, in this paper, we analyzed a lightweight privacy and authentication protocol for passive RFID tags.

Anonymizing Graphs Against Weight-based Attacks with Community Preservation

  • Li, Yidong;Shen, Hong
    • Journal of Computing Science and Engineering
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    • v.5 no.3
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    • pp.197-209
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    • 2011
  • The increasing popularity of graph data, such as social and online communities, has initiated a prolific research area in knowledge discovery and data mining. As more real-world graphs are released publicly, there is growing concern about privacy breaching for the entities involved. An adversary may reveal identities of individuals in a published graph, with the topological structure and/or basic graph properties as background knowledge. Many previous studies addressing such attacks as identity disclosure, however, concentrate on preserving privacy in simple graph data only. In this paper, we consider the identity disclosure problem in weighted graphs. The motivation is that, a weighted graph can introduce much more unique information than its simple version, which makes the disclosure easier. We first formalize a general anonymization model to deal with weight-based attacks. Then two concrete attacks are discussed based on weight properties of a graph, including the sum and the set of adjacent weights for each vertex. We also propose a complete solution for the weight anonymization problem to prevent a graph from both attacks. In addition, we also investigate the impact of the proposed methods on community detection, a very popular application in the graph mining field. Our approaches are efficient and practical, and have been validated by extensive experiments on both synthetic and real-world datasets.

Analyses of Security, Privacy Issues and Challenges for RFID System

  • Kim, Jung-Tae
    • Journal of information and communication convergence engineering
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    • v.9 no.6
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    • pp.701-705
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    • 2011
  • RFID is a widely adopted in the field of identification technology these days. Radio Frequency IDentification (RFID) has wide applications in many areas including manufacturing, healthcare, and transportation. Because limited resource RFID tags are used, various risks could threaten their abilities to provide essential services to users. A number of RFID protocols have done by researcher in order to protect against some malicious attacks and threat. Existing RFID protocols are able to resolve a number of security and privacy issues, but still unable to overcome other security & privacy related issues. In this paper, we analyses security schemes and vulnerability in RFID application. Considering this RFID security issues, we survey the security threats and open problems related to issues by means of information security and privacy. Neither a symmetric nor an asymmetric cryptographic deployment is necessarily used with light weighted algorithm in the future.

Light-weight Preservation of Access Pattern Privacy in Un-trusted Storage

  • Yang, Ka;Zhang, Jinsheng;Zhang, Wensheng;Qiao, Daji
    • IEIE Transactions on Smart Processing and Computing
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    • v.2 no.5
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    • pp.282-296
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    • 2013
  • With the emergence of cloud computing, more and more sensitive user data are outsourced to remote storage servers. The privacy of users' access pattern to the data should be protected to prevent un-trusted storage servers from inferring users' private information or launching stealthy attacks. Meanwhile, the privacy protection schemes should be efficient as cloud users often use thin client devices to access the data. In this paper, we propose a lightweight scheme to protect the privacy of data access pattern. Comparing with existing state-of-the-art solutions, our scheme incurs less communication and computational overhead, requires significantly less storage space at the user side, while consuming similar storage space at the server. Rigorous proofs and extensive evaluations have been conducted to show that the proposed scheme can hide the data access pattern effectively in the long run after a reasonable number of accesses have been made.

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Analyses of Security Issues and Requirements for RFID System and Its Application

  • Kim, Jung-Te
    • Journal of information and communication convergence engineering
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    • v.7 no.3
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    • pp.335-339
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    • 2009
  • RFID security and privacy issues have been intensively studied in the research field, the authentication between RFID reader and tag is the fundamental them. Most of the existing authentication protocols draw assumptions on classic primitives. Since tags have small capacities, the security mechanisms which are in use in computer networks and communication are not suitable. In this paper, we compare and analyze recent technical research on the problems of privacy and security. It consists of security mechanism, threats and performance evaluation, etc.

Grid-based Semantic Cloaking Method for Continuous Moving Object Anonymization (이동 객체 정보 보호를 위한 그리드 기반 시멘틱 클로킹 기법)

  • Zhang, Xu;Shin, Soong-Sun;Kim, Gyoung-Bae;Bae, Hae-Young
    • Journal of the Korea Society of Computer and Information
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    • v.18 no.3
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    • pp.47-57
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    • 2013
  • Location privacy has been a serious concern for mobile users who use location-based services to acquire geographical location continuously. Spatial cloaking technique is a well-known privacy preserving method, which blurs an exact user location into a cloaked area to meet privacy requirements. However, cloaking for continuous moving object suffers from cloaked area size problem as it is unlikely for all objects travel in the same direction. In this paper, we propose a grid-based privacy preservation method with an improved Earth Mover's Distance(EMD) metric weight update scheme for semantic cloaking. We also define a representative cloaking area which protects continuous location privacy for moving users. Experimental implementation and evaluation exhibit that our proposed method renders good efficiency and scalability in cloaking processing time and area size control. We also show that our proposed method outperforms the existing method by successfully protects location privacy of continuous moving objects against various adversaries.

Enhanced Mobile Agent Scheme for RFID Privacy Protection (RFID 프라이버시 보호를 위한 향상된 모바일 에이전트 기법)

  • Kim, Soo-Cheol;Yeo, Sang-Soo;Kim, Sung-Kwon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.2C
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    • pp.208-218
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    • 2008
  • We are sure that RFID system should be a widely used automatic identification system because of its various advantages and applications. However, many people know that invasions of privacy in RFID system is still critical problem that makes it difficult to be used. Many works for solving this problem have focused on light-weight cryptographic functioning in the RFID tag. An agent scheme is another approach that an agent device controls communications between the tag and the reader for protecting privacy. Generally an agent device has strong security modules and enough capability to process high-level cryptographic protocols and can guarantees consumer privacy. In this paper, we present an enhanced mobile agent for RFID privacy protection. In enhanced MARP, we modified some phases of the original MARP to reduce the probability of successful eavesdropping and to reduce the number of tag's protocol participation. And back-end server can authenticate mobile agents more easily using public key cryptography in this scheme. It guarantees not only privacy protection but also preventing forgery.

Analyses of Privacy and Vulnerability with Light-weight RFID System (저용량 RFID 시스템에서의 보안 및 취약성 분석)

  • Ahn, Byung-Jun;Park, Young-Bum;Nam, Jun-Woo;Kim, Jung-Tae
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2011.10a
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    • pp.773-775
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    • 2011
  • We analysed privacy, attack model and vulnerability with light-weight RFID System. A specific system's vulnerability depends on its implementation and the applied countermeasures. We can build an RFID system with a satisfactory security level even in a high-risk application area. To do so, however, we must pay attention to the implementation of proportional security measures.

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