SRAM-based unique chip identifier techniques

Srivatsan Chellappa, Lawrence T. Clark

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Integrated circuit (IC) identification using unclonable digital fingerprints facilitates the authentication of ICs, device tracking, and cryptographic functions. In this paper, we present two hardware methods exploiting the inherent process-induced mismatch of SRAM cells. The proposed circuits improve upon those previously published by reducing the number of bits that vary from trial to trial, and can be used at times other than just IC power-up. The proposed circuits and methods are compared with the previous power-up approach using the experimental results from a 90-nm test chip. The required SRAM array periphery circuit changes allow the use of standard foundry SRAM cells and do not impact the memory access time.

Original languageEnglish (US)
Article number7154509
Pages (from-to)1213-1222
Number of pages10
JournalIEEE Transactions on Very Large Scale Integration (VLSI) Systems
Issue number4
StatePublished - Apr 2016


  • Authentication
  • SRAM.
  • digital signatures
  • hardware security
  • physically unclonable functions (PUFs)

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Electrical and Electronic Engineering


Dive into the research topics of 'SRAM-based unique chip identifier techniques'. Together they form a unique fingerprint.

Cite this