Novel TCAM-based PUF with improved reliability for hardware-entangled security

作者：Tumuganti Nagakarthik; Kong Joonho; Choi Jun Rim^*

来源：IEICE Electronics Express, 2017, 14(17): 20170716.

DOI：10.1587/elex.14.20170716

• TCAM
• SRAM
• CAM
• PUF
• reliability
• uniqueness

Physical unclonable functions (PUFs) are the circuits that extract a number of unique chip signatures determined by random physical variations from fabrication. Since they are able to securely store and generate secret keys, PUFs allow to bootstrap the hardware-based implementation of an information security. This manuscript proposes a novel ternary content addressable memory based PUF (TCAM-PUF) for secure embedded systems. The PUF responses are simulated under various conditions, which are start-up values of TCAM cells. The results show that the proposed TCAM-PUF provides higher reliability and uniqueness than SRAM-PUF, which is one of the widely-used memory cell-based weak PUFs. According to our simulation, our TCAM-PUF provides an inter-chip and intra-chip hamming distance of 49.5% and 3.5% (on average), respectively and uniformity of 49.8% (on average).

• 出版日期2017-9-10