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SUMMARY:Optically enhanced position-locked power analysis - Sergei Skorobo
 gatov\, Computer Laboratory\, University of Cambridge
DTSTART:20061031T161500Z
DTEND:20061031T171500Z
UID:TALK5377@talks.cam.ac.uk
CONTACT:Saar Drimer
DESCRIPTION:This talk introduces a refinement of the power-analysis attack
  on integrated circuits. By using a laser to illuminate a specific area on
  the chip surface\, the current through an individual transistor can be ma
 de visible in the circuit's power trace. The photovoltaic effect converts 
 light into a current that flows through a closed transistor. This way\, th
 e contribution of a single transistor to the overall supply current can be
  modulated by light. Compared to normal power-analysis attacks\, the semi-
 invasive position-locking technique presented here gives attackers not onl
 y access to Hamming weights\, but to individual bits of processed data. Th
 is technique is demonstrated on the SRAM array of a PIC16F84 microcontroll
 er and reveals both which memory locations are being accessed\, as well as
  their contents.
LOCATION:Lecture Theatre 2\, Computer Laboratory\, William Gates Building
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