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136 sats \ 0 replies \ @027d8853cb 10 Sep \ on: PIXHELL Attack Exploits Screen Noise to Exfiltrates Data from Air-Gapped Devices security
This or similar sidechannel is the reason why Trezor One wallet has these weird lines around the PIN pad. This way, the same number of pixels are lit in each line, making it harder to guess the random arrangement of numbers from emissions.
Image credit: https://www.hedgewithcrypto.com/trezor-model-one-review/