为了满足信息化时代对信息加密安全性的要求，提出一种基于激光诱导击穿光谱（LIBS）技术的信息安全加密方法。使用常用的葡萄糖酸锌片和去离子水配制的水溶液在白纸上书写需要加密的信息，通过分析白纸和涂抹葡萄糖酸锌水溶液的白纸的LIBS光谱，发现Zn I在328.23 nm、472.22 nm和481.05 nm处的光谱线可以解读加密信息。通过扫描获得载有加密信息的白纸上不同位置处的LIBS光谱，并进一步通过去除基线、归一化和光谱叠加提高光谱强度空间分布的对比度，使得加密信息较清晰完整地被解读出来。实验结果表明，该方法通过生活中常用的葡萄糖酸锌片，实现了高效隐藏信息提取，具有安全性高、成本低和制作便捷等优点，为LIBS在信息加密领域提供了新思路，具有一定的潜在应用价值。

In order to satisfy the requirements of information encryption security in the information era, this paper presents a method of information encryption based on laser-induced breakdown spectroscopy (LIBS) technology. The information to be encrypted was written on white paper with an aqueous solution prepared from zinc gluconate tablets and deionized water. By analyzing the LIBS spectra of white paper and of white paper coated with aqueous zinc gluconate solution, the spectral lines of Zn I at 328.23 nm, 472.22 nm, and 481.05 nm were used to decrypt the information. The LIBS spectra of different positions on the white paper containing the encrypted information were obtained by scanning, and the contrast of the spatial distribution of spectral intensity was improved by baseline correction, normalization, and spectral superposition, allowing the encrypted information to be interpreted more clearly and completely. The experimental results show that this method achieves efficient extraction of hidden information with zinc gluconate tablets commonly used in daily life, and has the advantages of high security, low cost, and convenient production. It provides a new idea for LIBS in the field of information encryption, and has value for certain potential applications.