• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.5C
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• pp.415-421
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• 2005

Passive RFID tag does not have its own power, so it has very poor computation abilities and it can deliver signals in very short range. From the facts, most RFID Tag security schemes assumed that the backward channel from tags to a reader is safe from eavesdropping. However, eavesdroppers near a tag can overhear message from a tag illegally. In this paper, we propose a method to protect the backward channel from eavesdropping by illegal readers. The proposed scheme can overcome the problems of conventional schemes such as randomized tree walking, which have been proposed to secure tag information in tree-walking algorithm as an anti-collision scheme for RFID tags. We showed the efficiency of our proposed method by using an analytical model, and it is also shown that the proposed method can provide the probability of eavesdropping in some standardized RFID tag system such as EPCglobal, ISO, uCode near to '0'.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.1
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• pp.215-222
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• 2008

In this paper, we analyse eavesdrop problem of existing RFID security scheme and proposed improved SEEB algorithm for RFID security. we suggest partial round process and security in SEED algorithm. Existing scheme has vulnerability of security and implementation so far from realization. Therefore In our paper, we proposed new scheme using modified SEED algorithm for backward channel protection.