Hidden Data in NFC Tags

by @edent | # # # # | 1 comment | Read ~247 times.
Various NFC icons.

I've just got a set of wearable NFC tags, and I've discovered something interesting about the way data is stored on them. tl;dr Overwriting a tag can leave old data intact, and still readable. Here's the decoded memory layout of a tag with data written to it. In this case, a (failed) experiment at storing… Continue reading →