Here's the post by the researchers themselves: https://srlabs.de/pos-vulns/
tldr: POS card readers have poor security - their HSMs leak their keys, and many of them don't have unique keys so you can impersonate them
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But warning! This is pure stream dump, don’t expect high quality yet.
Here's the post by the researchers themselves: https://srlabs.de/pos-vulns/
tldr: POS card readers have poor security - their HSMs leak their keys, and many of them don't have unique keys so you can impersonate them