With the definition from edelans, attacks can be made on Ledger devices (or any device, for that matter) by watching how the hardware behaves as it does its thi

With the definition from edelans, attacks can be made on Ledger devices (or any device, for that matter) by watching how the hardware behaves as it does its thing. Here's a recent proof of concept: https://www.coindesk.com/security-researchers-break-ledger-wallets-with-simple-antennae https://www.coindesk.com/security-researchers-break-ledger-w.... TLDR, entering your pin # on a device results in significant enough current changes that they can be picked up, turned into a training set, and your pin can be worked out. This repo provides a bunch of utils and examples to facilitate the testing and analysis of such attacks.