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    Bilateral privacy-preserving energy sharing in network-constrained models via homomorphic encryption-based distributed optimization
    (2026-05-01)
    Wang, Hongli
    ;
    Yang, Jun
    ;
    Li, Gaojunjie
    ;
    Wu, Fuzhang
    ;
    Xie, Lilong
    The proliferation of distributed energy enables prosumers to participate in local trading, yet privacy concerns and network constraints hinder market implementation. This paper proposes a bilateral privacy-preserving energy sharing mechanism that secures sensitive data while enforcing grid operational limits. We develop a prosumer decision model incorporating utility functions and transfer distance factors. To resolve privacy-coordination conflicts, a distributed optimization framework compatible with nonlinear models is designed by integrating gradient descent and dual ascent. This framework guarantees convergence under problem convexity and Lagrangian gradient existence. Furthermore, a homomorphic encryption scheme is integrated to enable dual-blind computations, which prevents plaintext disclosure to either prosumers or the operator while maintaining network safety. Theoretical analysis confirms the scheme's correctness and computational tractability. Numerical simulations on IEEE 14-bus and 33-bus systems validate the mechanism regarding convergence, bilateral privacy protection, and social welfare enhancement. Finally, the algorithm's scalability is demonstrated through penalty-based acceleration, which meets the practical deployment requirements of modern power system.
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    Factors affecting disclosure of personal health information via mobile application
    (2017-06-27)
    Atchariyachanvanich, Kanokwan
    ;
    Mitinunwong, Nichaporn
    ;
    Tamthong, Butsaraporn
    This study explored the factors that affect personal health information (PHI) disclosure via a mobile application (app) in Thailand. Since mobile apps are increasingly popular, as is the Thai people's concern on their health condition, many mobile app service providers want to know which factors would persuade customers to reveal their PHI via mobile apps. This research model was, therefore, developed and included the six factors of: personalized service, self-presentation, mobile app reputation, familiarity, perceived benefits and privacy concerns. The hypotheses were tested by structural equation modeling using the questionnaire responses from 252 valid subjects. Surprisingly, privacy concern was not significantly negatively related to the intention to disclose PHI. However, the significance effect of the perceived benefit, personalized service and self-presentation were consistent with previous studies. The implication of the result will shed light on the development of healthcare mobile apps.
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    A survey on internet of things architecture, protocols, possible applications, security, privacy, real-world implementation and future trends
    (2016-02-04)
    Kraijak, Surapon
    ;
    Tuwanut, Panwit
    The Internet is dramatically evolving and creating various connectivity methodologies. The Internet of Things (IoT) is one of those methodologies which transforms current Internet communication to Machine-to-Machine (M2M) basis. Hence, IoT can seamlessly connect the real world and cyberspace via physical objects that embed with various types of intelligent sensors. A large number of Internet-connected machines will generate and exchange an enormous amount of data that make daily life more convenient, help making a tough decision and provide beneficial services. This paper not only describes about the evolution and how important of IoT in daily life, the generic architecture, its most widely used protocols, numerous possible applications but also concern over security and privacy issues in IoT, real-world implementation of IoT system by using Arduino and its future trends. The IoT probably becomes one of the most popular networking concepts that has the potential to bring out many benefits.
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    The use of security cameras with privacy protecting ability
    (2011-05-02)
    Prashyanusorn, Vacharee
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    Prashyanusorn, Paiboon
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    Kaviya, Somkuan
    ;
    Fujii, Yusaku
    ;
    Yupapin, Preecha P.
    A novel method of security camera operation is proposed. In the method, security cameras, which encrypt the taken images and store them into the memory card inside, are used. Only when crimes occur, the memory cards are taken out from the cameras and the images are decrypted with the key and viewed by the city government and/or the police. When no crimes occur, images are overwritten by the new ones after a week automatically without being viewed by anyone. By using the stand-alone cameras without wiring to the control center, the installation cost and the operation cost are much lower than CCTV cameras. By using image encryption, the privacy of the tourists is protected. Using this system, high density installation of the security cameras with very low cost can be realized in encryption with image encryption privacy protection function.
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    e-JIKEI Network using e-JIKEI Cameras: Community security using considerable number of cheap stand-alone cameras
    (2010-08-01)
    Fujii, Yusaku
    ;
    Maru, Koichi
    ;
    Kobayashi, Kojiro
    ;
    Yoshiura, Noriaki
    ;
    Ohta, Naoya
    The e-JIKEI Network, a concept for realizing a safer and more comfortable community, and the e-JIKEI Camera, a stand-alone camera developed for the e-JIKEI Network, are reviewed. The concept of the e-JIKEI Network is that residents view their surroundings using cheap cameras, which act as their eyes, and home computers, which act as their brains, using the free software provided by us through the Internet. For the complete protection of the privacy of ordinary citizens, we propose a second concept supporting the concept of the e-JIKEI Network; in this concept, those who own and manage images (owners) and those who have the right to view these images (viewers) are separated by means of image encryption. Since 2004, the " Dairi-EYE" series, a free software for a personal computer (PC)-based system, has been distributed through our website. However, the use of PCs is not very user-friendly. Therefore, an all-in-one device called the " e-JIKEI Camera" has been developed. A social experiment of the e-JIKEI Network using e-JIKEI Cameras has been carried out. © 2010 Elsevier Ltd.