The
trend of digitalization has produced rapidly increasing data
interaction and authentication demand in today’s internet of
things ecosystem. To face the challenge, we demonstrated a micro-scale
label by direct laser writing to perform as a passport between the
physical and digital worlds. On this label, the user information is
encrypted into three-dimensional geometric structures by a tensor
network and then authenticated through the decryption system based
on computer vision. A two-step printing methodology is applied to
code the randomly distributed fluorescence from doped quantum dots,
which achieved physical unclonable functions (PUFs) of the passport.
The 105 bits/mm2 data storage density enables
abundant encrypted information from physical worlds, for example,
the biometric data of human users. This passport guarantees the strong
correlation between the user’s privacy data and the PUF-assisted
codes, successfully overcoming the illegal transfer of authentication
information. Due to its ultra-high security level and convenience,
the printed passport has enormous potential in future digital twin
authentication anytime anywhere, including personal identity, valuable
certificates, and car networking.