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2009
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Device temporal forensics: An information theoretic approach

8 years 4 months ago
Device temporal forensics: An information theoretic approach
By formulating the problem of ordering the outputs observed from a device over time, we pose a new problem in forensics and propose a framework for addressing this problem of device temporal forensics. Our proposed framework is based on a two-stage approach wherein time-dependent device parameters are first estimated from observed outputs and the resulting estimates are then temporally ordered by employing a Markov model for the temporal evolution of device parameters and exploiting the data processing inequality in information theory. We demonstrate and evaluate a simple realization of the framework for digital camera forensics based on photo-response non-uniformity. Results obtained over a database of online images indicate that the method provides accurate temporal ordering.
Junwen Mao, Orhan Bulan, Gaurav Sharma, Suprakash
Added 19 Feb 2011
Updated 19 Feb 2011
Type Journal
Year 2009
Where ICIP
Authors Junwen Mao, Orhan Bulan, Gaurav Sharma, Suprakash Datta
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