Telemedicine and Echocardiography

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It is possible to embed a visually imperceptible, encrypted patient history in an echocardiographic image. The confidential information is "hidden in plain sight" using a technique called steganography. The advantage of this technique is that it does not attract attention to itself, and does not invite further scrutiny.

Demonstration of Steganography

This is an original image of aortic dissection.
The second, visually indistinguishable image contains a hidden file called dissection.html. It was encrypted with the S-Tools program using the IDEA encryption algorithm with the file name: "dissection.html" as the pass phrase needed to decrypt the hidden file.

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The contents and links on this page were last verified January 2007 by Dr. Olga Shindler.