University of Florida Research Foundation Inc

Fahim Rahman

Mark M Tehranipoor

Farimah Farahmandi

Adib Nahiyan

Domenic J Forte

Andrew C Stern

Mohammad Sazadur Rahman

Methods, apparatus and computer program product for protecting a confidential integrated circuit design process. The computer-implemented method includes receiving a design specification dataset from a first untrusted computing device; extracting confidential design specification data from the design specification dataset; encrypting the confidential design specification data to produce encrypted confidential design specification data; generate a first encryption key to be associated with the encrypted confidential design specification data; retrieving a confidential design specification data subset for replacing a design element subset with a security hard macro (SHM) placeholder design element set; generating a security hard macro (SHM) placeholder feature set comprising those security hard macro (SHM) placeholder features representing mappings from the confidential design specification data subset to the SHM placeholder design element set; and transmitting, to the first untrusted computing device, the encrypted confidential design specification data, the first encryption key, and the SHM placeholder feature set.

Method, apparatus and computer program product for protecting confidential integrated circuit design

A dynamically obfuscated scan chain (DOSC) includes a control module designed to control memory loading, a linear feedback shift register (LFSR), a dynamic Obfuscation Key generator configured to use LFSR to generate a &#x3c6;-bit protected Obfuscation Key, in order to confuse and change the test data into an output scan vectors when the Obfuscation Key update is triggered. The DOSC also includes a shadow chain, configured to input the &#x3c6;-bit protected Obfuscation Key generated by the LFSR, and output k&#x2514;&#x3c6;&#xd7;&#x3b1;&#x2518;-bit protected Obfuscation Keys, and obfuscated scan chains. The DOSC operating method includes: loading control vectors to LFSR from control module during initialization; generating the Obfuscation Key at an output of the LFSR; generating the Obfuscation Key bit by bit based at least in part on the shadow chain and the Obfuscation Key during a first scan clock after reset in order to confuse test patterns.

Protecting obfuscated circuits against attacks that utilize test infrastructures

Growing community of inventors

Gainesville, FL, United States of America

Fahim Rahman