Advanced Techniques for Securing Digital Images

Purpose of the STSM:

The purpose of this short term scientific mission (STSM) was to establish  collaboration with the hosting group in the field of Multimedia Security at the Otto-von-Guericke University of Magdenburg (Germany). I visited Magdeburg from the 8-21. February 2016 and my academic host was Prof Dr Jana Dittman.

 

Work carried out during the STSM:

During the two weeks the STSM allowed me to discuss advanced techniques and algorithms for securing digital fingerprint images. The members of the hosting group showed me their activities concerning modern scanning techniques of fingerprint traces. The chromatic white light sensor and laser scanning microscope, typically used for the measurement of surface properties for quality assurance purposes, were shown to me. To the resulting high-resolution biometric data, invertible fragile image watermarking is applied, to assure authenticity and integrity of the digital fingerprint images in a forensic investigation. Privacy protection is added by encryption and substitution of the fingerprint area. This scheme can be extended to be used in a digital signature scenario with hierarchical access for further forensic investigation. The capacity of the embedded watermark in the digital images is evaluated in theory and in practical tests using image samples. Preliminary results using this technique from host institution are promising, therefore I hope we will further collaborate in this field during next period.

 

The electronic database of the University has supplied me with considerable material – articles and reviews – which promise to be vastly helpful in my future research work.

 

Also, my hosts made me familiar with their experience regarding the education profile ForensikDesign@Informatik, thaught at the University of Magdenburg.

 

Outcomes of the STSM:

The outcomes of this STSM can be summarized as follows:

  • Interchanging of the present knowledge, methods and research experience regarding image data securing and its implication on modern forensics;
  • To become familiar with the developed methodology in the hosting group and its application in the modern society;
  • Further collaboration on joint master courses in the field of Multimedia Security is considered.

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