Contactless cards: how technology works and how to protect yourself from tran- sactions without your consent

Abstract

The NFC was implanted in credit and debit cards to facilitate financial transactions between customers and merchants. This technology, like any other, brings benefits and problems, in this case we need to take some precautions so that we can correctly use this technology. One of the problems is that: because it is a technology capable of making payments without the need for a password, many people end up choosing not to use such technology for fear of carrying out transactions without their consent, even with the card in their pocket or purse, for example. Therefore, this works this work aims to dissemination of how this technology works and a tutorial on how to produce a low-cost ’shielded’ card holder with accessible materials, they will be able to help people protect themselves from these possible blows and prevent them from taking advantage of the technology. day to day processes. As a result, this works had 03 publications shared on the social network Instagram, which managed, at the time of writing this works, to reach around 800 people each. These publications brought the information to some people who were afraid to use it because they didn't know it. These posts are still available on the Social Network and it is possible to reach and inform more people.