%0 Journal Article %T Privacy-Preserving Health Data Collection for Preschool Children %A Shaopeng Guan %A Yuan Zhang %A Yue Ji %J Computational and Mathematical Methods in Medicine %D 2013 %I Hindawi Publishing Corporation %R 10.1155/2013/501607 %X With the development of network technology, more and more data are transmitted over the network and privacy issues have become a research focus. In this paper, we study the privacy in health data collection of preschool children and present a new identity-based encryption protocol for privacy protection. The background of the protocol is as follows. A physical examination for preschool children is needed every year out of consideration for the children's health. After the examination, data are transmitted through the Internet to the education authorities for analysis. In the process of data collection, it is unnecessary for the education authorities to know the identities of the children. Based on this, we designed a privacy-preserving protocol, which delinks the childrenĄ¯s identities from the examination data. Thus, the privacy of the children is preserved during data collection. We present the protocol in detail and prove the correctness of the protocol. 1. Introduction With computers and networks having become an important tool in everyday life, more and more data need to be transmitted through networks. Meanwhile, privacy issues have drawn public attention. How to protect privacy in a network environment has become a research focus in the field of computer network. Privacy, broadly speaking, refers to private data held by organizations or individuals, which are confidential to others. For individuals, private information such as personal identification, physical condition, and geographical location is all private [1]. The spread of private information will cause a lot of negative consequences, even leading to crimes. Therefore, privacy-preserving technology becomes an important research direction. At present, researches of privacy-protection technology in the network include at least the following areas. Privacy Protection in Wireless Sensor Networks. Wireless sensor networks have broad application prospects in the fields of environmental monitoring, health care, national defense, and so on. However, in practical applications, wireless sensor networks are facing a serious risk of data disclosure or tampering that will lead to serious consequences [2¨C5]. For example, in the field of military, data collected by wireless sensor networks often contain important intelligence information which, if disclosed or tampered with, will pose a serious threat or military missteps. The privacy-protecting technology is an indispensable part of wireless sensor networks [6¨C10]. Privacy Preserving-Data Mining. Data mining is the most important knowledge discovery tool %U http://www.hindawi.com/journals/cmmm/2013/501607/