A new method of optical encryption has been developed, one that promises to revolutionize the way information is stored and secured. This method, termed nonlinear medium optical encryption, exploits the properties of a nonlinear optical medium to provide encryption that is more secure than traditional methods. In this technique, an encrypted signal is first encoded by a nonlinear optical medium, and then decoded by a receiver. The encryption process itself is based on the properties of the nonlinear medium, which acts as a “key” to unlock the encoded message. This form of encryption is more secure than traditional methods, as the properties of the nonlinear medium make it difficult for an unauthorised third party to break the code. Furthermore, the encryption process is computationally efficient, making it suitable for use in a wide range of applications.

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source: Phys.org