Perceptual Hashing Explained: A Powerful Tool for Image Comparison 🔍

#cryptology, #cryptography, #cryptanalysis

In this video, we discuss perceptual hash functions, which can be used in forensics for e.g. seaching of images in image databases.

We first show, what perceptual hash functions are. Then, we discuss the "block hash" method. Finally, we play with the block hash implementation of CrypTool 2.

If you are interested in learning the fundaments of cryptology, let me invite you to have a look at our video series about the basics of cryptology, also for beginners: https://youtu.be/jbumW7Ym03o

Mentioned paper: Steinebach, Martin. "Robust hashing for efficient forensic analysis of image sets ." International Conference on Digital Forensics and Cyber Crime. Springer, Berlin, Heidelberg, 2011

You can download the latest version of CrypTool 2 from here: https://www.cryptool.org/en/ct2/downloads

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