pin pad

Greetings to all! Many of us have read at least once how banking transactions are processed. And we all know that an unencrypted PIN does not go anywhere beyond the pin pad. But there is traditionally not enough information about how exactly this is implemented. So, during this article we will...

Greetings to all! Many of us already know that POS terminals and pin pads are usually assembled on the basis of custom chips, datasheets for which cannot be found. But, of course, this was not always the case. And I became interested: what if I try to find such an ancient terminal, reverse its...