What about the security of the details included in the vCard QR code?

QR code is a secure technology, and after creating vCard QR codes, they do not pose any inherent risk. However, it's important to note that any person scanning the vCard will have access to the personal information in the vCard. Therefore, when preparing a vCard QR code, attention should be paid to the personal information included. For example, adding a home address to a vCard could be risky because if the QR code is accessed by unauthorized individuals who learn your home address or other sensitive personal information, it could lead to problems.