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The idea is very simple and goes as follows:
1. Make a vCard for the person. A vCard is a contact card with the same format as the contacts in any phone device.
2. Generate a QR code for the vCard made with one of two options:
Option 1: Static QR code: This basically will transform all the text in the vCard into elements of the QR code. This method is not recommended since it will be a complex QR code, containing a lot of information, which will make it difficult to scan smoothly.
Option 2: Dynamic QR code: in very simple terms the QR code generator will save the vCard information on cloud storage with a specified URL address and the QR code will reflect only the URL address which will can be scanned easily.