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Output Values Oracle
Input Values Oracle
=
Registry
Records
Yossef Oren
Ofir Weisse
Observer 1
Observer 2
Observer 2's opinion
Observer 1's opinion
Avishai Wool
Device Under Test
Results on DPA v4 Data Set
9 seconds running time per
power trace (median)
2 power traces required to yield correct key
as rank 1 (at 79.6% success)
Source code available online
Constraint Graph for AES (first round)
2,13
AddKey
SubBytes
7,8
2,7
7,8
2
~500 X
2,7
7,8
2,7
2
~500 X
13,8
2
500
Correct key quarter is mostly
among the top 10
~500
Strengthen points of agreement
2
500
256 X
2
500
2
500
Prefer accurate observation (with low variance)
over less accurate (with high variance)
Can intersect candidates from
2 runs
=
2
~500 X
2
~500 X
x
Weaken points of disagreement
Eliminate points deemed impossible by an observer
to next compute
node
=
Conflation:
x