Extended Visual Cryptography Kit (EVCK)

Outline

• What is EVCK?
• What does it do?
• Requirements
• How to obtain
• Download
• License
• References

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What is EVCK?

EVCK is a tool that implements a 2 out of 2 threshold extended visual cryptography scheme.
Born from the idea of G. Ateniese, C. Blundo, A. De Santis, and D. R. Stinson (Extended Schemes for Visual Cryptography) and for a seminar about it.

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What does it do?

Given:

• two looking innocent image I1, I2,
• an image SI containing the secret.

Encode I1 and I2 so that we can obtain SI by stacking together their transparencies.

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Requirements

The only requirement to run EVCK is Java 1.4

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How to obtain

Download it, unzip and refer to the README file for more information about executing.

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Download

• evck.zip
• evck-src.zip - Java source
• evck-javadoc.zip - Classes Javadoc

 

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License

EVCK is released under the GNU General Public License (GPL). See COPYING file in the packages for more information.

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References

• Extended Schemes for Visual Cryptography
  by G. Ateniese, C. Blundo, A. De Santis and D. R. Stinson,
  submitted to Theoretical Computer Science
• Visual Cryptography
  by M.Naor and A. Shamir.
  the first about Visual Cryptography.
• Visual Cryptography Kit (VCK)
  by F. Stajano
  http://www-lce.eng.cam.ac.uk/~fms27/vck/