Research On Security And Privacy For Low-cost Radio Frequency Identification

Radio frequency identification (RFID) is expected to become an important and ubiquitous infrastructure technology in the near future. It is a kind of contactless data acquisition and automatic identification technology, which is used to remotely and quickly collect information and automatically identify massive and moving objects under terrible conditions.To improve Supply Chain Management (SCM) and the inventory inside stores, placing a tag on individual item is warmly discussed. When RFID tags come to individual item the widespread deployment of RFID tags may bring new threats to consumer privacy, due to the powerful tracking capability of the tags. The core problem is due to the basic function of RFID tags: each ED can be scanned remotely by anyone. Tags respond automatically to any reader and transmit their information indiscriminately. Anyone with a scanner will now be able to trace others and know what is in their bags. This property can be used to track a specific user or object over wide areas and is viewed as a primary barrier to the widespread adoption of RFED.To address these consumer concerns, different solutions have been proposed and discussed. Some of these are based on cryptography, which is also the object of this paper. At present the main problem about encryption in low-cost RFED systems is not the strength of the algorithms, but due to constraints whether it is possible and feasible. The constraints are that tags need to be small, so only a limited supply of power is available to a tag. Besides these limits, tags are not allowed to cost much either, so the number of the gates which used to computation and operation is limited. Thereby, it is hard to design a low-cost RFED system with enough privacy protection.To prevent the potential risk and enhance the consumer privacy, this paper first completely outlines the framework of security and privacy problems about RFED.Particularly, we present and classify threats and security requirements and show the link between traceability and the communication model. Also we analyze the existing RFID protocols and schemes. According to the life cycle of the product we firstly proposed and analyze the security and performance of our general type and enhanced type secure mode tag scheme which using hash function that fits for the low-cost RFID environment. The advantages of our scheme compared to the previous works are that we offer the forward security while ensure low cost, also we reducing the computation complexity on both sides of the system and tags.