1 protecting your privacy with a mobile agent device in rfid environment authors: sang-soo yeo,...

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Protecting Your Privacy with a Mobile Agent Device in RFID

Environment

Authors: Sang-Soo Yeo, Soo-Cheol Kim, Sung Kwon Kim, Gilcheol Park, Seok Soo Kim, Ki-Sung Yang, Sung-Eon Ch

oSources: Wireless Personal Communication, vol. 51, no. 1,

pp. 165-178, 2009Speaker: C. H. WeiDate: 2009.10.31

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Outline

• The Problem• MARP• eMARP• Security and efficiency analysis• Conclusion• Comments

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The Problem

• An attacker can eavesdrop the tag’s PIN. (mode change key of the tag t)

• There are many readers and agents in system, it will decrease overall performance of MARP scheme.

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MARP

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MARP-Initial setup phase

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MARP- Privacy protection phase (Tag sleep mode)

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MARP- Authentication phase (Tag wake mode )

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MARP-Main scheme

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eMARP

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eMARP- Registration phase

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eMARP- Agent working phase

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Security and efficiency analysis• Eavesdropping

– One-way hash function and self refreshed PINt

– Most of communication are performed using a public key cryptosystem, it is safe from eavesdropping

• Spoofing attack– Only authenticated reader or agent , who know secret

PIN of the tag• Location tracking

• Tag forgery

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Comments

• The problem is solved– An attacker can eavesdrop the tag’s PIN.

– There are many readers and agents in system, it will decrease overall performance of MARP scheme.

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Comments (cont.)

• Advantage– This paper integrate mobile agent and public-

key center to replace the disadvantage that the efficiency of the tag is not enough and security.

• Disadvantage– eMARP cannot resist Spoofing attack– eMARP cannot resist Location tracking

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h(PINt)1♁h(Keyt) ♁ h(PINt)2♁h(Keyt)

=h(PINt)1♁h(PINt)2

h(PINt)1♁h(PINt)2 ♁h(PINt)2

=h(PINt)1

h(PINt)1 ♁h(PINt)1♁h(Keyt)

=h(Keyt)………Registration phase