Bionic optical physical unclonable functions for authentication and encryption

Information security is of great importance for modern society with all things connected. Physical unclonable function (PUF) as a promising hardware primitive has been intensively studied information security. However, the widely investigated silicon PUF low entropy vulnerable to various attacks. Herein, we introduce concept bionic optical PUFs inspired from unique biological architectures, and fabricate four types by molding surface micro-nano structures natural plant tissues simple, low-cost, green environmentally friendly manufacturing process. The laser speckle responses are statistically demonstrated be random, unique, unpredictable robust enough cryptographic applications, indicating broad applicability PUFs. On this ground, feasibility implementing primitives in entity authentication encrypted communication experimentally validated, which shows its potential application future