POWER ANALYSIS OF CRYPTOGRAPHIC MODULE FOR WIRELESS SENSOR NODE

Open Access
Author:
Gupta, Ravikant
Graduate Program:
Electrical Engineering
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
November 17, 2010
Committee Members:
  • Sven G Bilen, Thesis Advisor
Keywords:
  • Wireless Sensor Network
  • Cryptogrpahy
  • Emnedded Module
Abstract:
A wireless sensor network (WSN) is a combination of various spatially distributed sensor nodes controlled and monitored by a master terminal. If sensitive data is shared between master and node that data must be encrypted. Additionally, WSN nodes are generally self powered thus node power consumption must be minimized. This work presents a power analysis of a Cryptographic Module (CM) for wireless sensor networks. The core elements of CM, which will be certified to the Federal Processing Standard 140-2, are two Texas Instrument's MSP430 microprocessors one functioning as master, the other as slave. Master/Slave communication is implemented through a Serial Peripheral Interface Bus (SPI) which facilitates ciphering, deciphering and transfer of sensitive data using the AES Advanced Encryption Algorithm. Implementation of FIPS approved AES and Diffie Hellman key exchange cryptographic algorithms was a system specification requirement. Authentication and attack prevention techniques include Known Answer Test (KAT), Error Correcting Code (ECC) and Zeroization. CM power is provided through Vibration Energy Harvesting (VEH), therefore power management is a critical requirement. Accordingly, the CM design implements power management via component selection, code optimization and implementation of a Low Power Mode (LPM). The CM was developed using Texas Instrument's USB-Debug-Interface and IAR embedded workbench. Subsequent to verification and certification, the CM will be operationally deployed aboard Navy Ships.