NFC technology among all its advantages, also has the issue of security. The fact that a very short distance (about 10 cm) is required for data transmission, leads to greater control. That is, unlike the QR codes, in which that information may be distributed by third parties, NFC enables the transmission to happen only when you want it and understand it.
This is a technology that is within everyone's reach, since it is incorporated into modern smartphones, which has made it economically attractive and still offers a higher quality than other data transmission tools. In addition, by following international security parameters, it is also able to offer a greater guarantee of confidence to the user.
Security levels vary according to the chips chosen, due to their cryptographic characteristics. There are chips which are used as security seals to guarantee the authenticity of a product, since it is possible to store in the chip's memory a block of interactions, which can be checked at any time by the user.
In addition, we can also talk about security at a personal level, since with the use of NFC technology, the control of your information is superior. You can only provide the information that the memory of the chip allows. In some cases, and depending on the way it is programmed, the chip can be deactivated, becoming inactive.
The fact that no physical contact is required from the user to transmit the data, gives this technology a high degree of security in terms of public health. For example, when paying with contactless cards, you don't need to touch anything. This is advantageous for the user and for the person to whom he wants to share his information.