Recently, system designers, especially in the field of product life-cycle management system start considering use of user memory bank of UHF RFID tags. By storing most useful life-cycle data onto a tag, user can access to the data even without access to back-end databases. One of the major issues to make use of the user memory bank is detection of memory tampering. Although technology vendors start introducing new functionalities such as fine grained locking along with high capacity user memory, these tags with new functionalities require new non-standardized air protocol to operate -require modified version of reader/writers. Also, these tags are usually more expensive. In this paper, we introduce a novel approach to this problem: tag side write journaling mechanism and "Tag Memory Cloaking," which protect the journal by using. Tag Private Memory region, which is only readable and not writable from external devices such as a reader/writer, but writable by tag itself. Also, any write to the user memory automatically add journal entry -offset and length of the write -into the Tag Private Memory region. Later, a user can check existence of overlapped writes to user memory by checking the journal records. Since we have not modified any of air protocol, standard compliant read/writer can fully capable of all of our proposed operations: write to the tag, read, then detect unusual modification to user memory area. We have implemented the functionality to Programmable Battery Assisted Passive tag (BAP), then validated the method with several standard compliant reader/writers.

The Internet of Things is a concept of connecting small real space physical objects to the Internet using sensor network, RFID, and other forms of wireless network technologies.In this paper, we present an EPC (Electronic Product Code) based Internet of Things (IoT) architecture. The key concept of the architecture is EPC network over heterogeneous access network. We particularly focused on a ZigBee network as it can collect the latest information about 'Things'. The EPC Network provides certain static information about 'Things' such as name and manufacturer. To support end-to-end communication between sensor nodes and applications, Constrained Application Protocol (CoAP) instead of Hyper Text Transfer Protocol (HTTP) over ZigBee is developed. A gateway on a local area network converts HTTP and CoAP. A pseudo Universal Plug and Play (UPnP) protocol supports JOIN/LEAVE management of sensor nodes. We also prove a prototype home appliances management system that adopt our architecture over a ZigBee network. Our prototype provides energy-saving application using home appliances information collected through the system.

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RFID attracts attention as a useful device in locationaware application. SPEARS WG of WIDE Project had already developed a system [2], which uses RFID devices as a sensor of human's location. Purpose for this system is to provide the service based on a user's location in a conference. In this system, the model in which location of user is gathered and provided per each user was adopted. This paper describes several areas of problems and improvements in our latest implementation. The following functions were implemented by the addition of a system called "Area-d": 1) provide a service tied with a location, and 2) provides users' communication rendezvous service. These functions are able to add to the existing system without altering the existing model. This paper describes a location-oriented data processing model and applications.

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