光学存储材料给重要资产装上“安全锁”

Core Insights - A research team from Kunming University of Science and Technology, in collaboration with Nanjing University and Tsinghua University, has discovered a multi-color photochromic lead molybdate (PMO) microcrystal with reconfigurable memristive behavior, enabling optical interlocking and cascading hash time-space self-encryption [1][2] - The PMO microcrystal can switch between light yellow, gray, and pink optical response channels when exposed to specific wavelengths of light, making it suitable for integrated photonic devices that require all-optical solutions [1] - The gray and pink channels exhibit excellent reversibility and durability, with optical transmittance modulation ratios of 60% and 99% respectively, and the pink channel shows non-volatility, remaining stable for over 1500 days [1] Application and Implications - The research team proposed a new optical encryption paradigm using PMO and patterned photolithography arrays, resembling blockchain encryption, where different plaintext and private key information are encoded in separate photochromic channels [2] - This method is particularly effective for high-value assets or intellectual property, providing robust anti-cloning and anti-cracking measures [2] - The breakthrough holds significant theoretical value in materials science and shows promising applications in information security and anti-counterfeiting, especially with the rise of emerging technologies like quantum computing [2]