Lightweight Privacy for Ubiquitous Devices

In this paper, we survey the recent research results on privacy-preserving Identification suitable for limited-resource devices such as RFID, contactless smartcards, and introduce our recent results on a light-weight privacy-preserving identification scheme. The proposed scheme only requires (1) random bit generators, (2) simple bit-wise operations and (3) short storage for keys less than 1 Kbits. No cryptographic algorithms such as SHA-1 are required. On the other hand, security of the scheme is reducible to learning parity -with noise problem (LPN problem) which is further reducible to a problem in NP-complete.