Recently, the appearance of public NFC tags are growing in major populated areas. The company I am currently working along side with wants to increase their advertisements with a NFC tag placed on the side of their ad so users can navigate to their website and,want to later expand it to opening up the app store to download a specialised application.
How would one go about protecting the tags at that point? As these tags are available to purchase to the public and do not take two wits to program something simple & someone who specialises in programming can figure out a simple malicious hijack (there's a few which come to my head, for security sake I will not name)
So with the scenario that unattended public NFC tags, how to prevent malicious hijacking ie. Prevent person A from swapping out legit nfc tag with a malicious tag in its place?