Zhejiang University Huang Feihe and Wu Ziliang cooperate with AM: Subject and object invisible ink realizes time-dependent encryption of information

The rapid development of information technology has provided corresponding needs for improving information security

Recently, Professor Huang Feihe of Zhejiang University, Researcher Wu Ziliang, Dr.

Graphic guide

First prepare an invisible ink, which can affect the time-dependent encryption of information

Time encryption scheme of information

The supramolecular network is obtained when P1 and P2 are mixed

Supramolecular network

The formation of supramolecular networks and the degradation of competitive guest or host will affect the mobility of the constituent polymer chains, which control the degree of cyanine aggregation

Adjust the rate of fluorescence decay

By immersing cellulose paper in a chloroform solution containing P1 and P2, and then air drying for 24 hours, a method capable of encoding time-related information was developed

Time-varying information encryption

The resolution and precision of encrypted text are important attributes of invisible ink

Highlight summary

The author demonstrated a new information encryption method that uses host-guest interactions to adjust the structure of self-assembled supramolecular networks (SN) and the time-dependent photochromic behavior of the spiropyran part embedded in the network