Physical Unclonable Functions using speckle patterns of perfect optical vortices
This work addresses security issues in optical encryption systems for applications requiring high-security digital implementations, though it appears incremental as it adapts existing PUF concepts to a new optical method.
The paper tackles the vulnerability of digital encryption systems to crypt-analysis attacks by proposing a Physically Unclonable Function (PUF) that uses speckle patterns from scattered perfect optical vortex beams to generate robust security keys, validated through experimental and simulation results as an effective alternative to digital keys.
Encryption techniques demonstrate a great deal of security when implemented in an optical system (such as holography) due to the inherent physical properties of light and the precision it demands. However, such systems have shown to be vulnerable during digital implementations under various crypt-analysis attacks. One of the primary reasons for this is the predictable nature of the security keys (i.e., simulated random keys) used in the encryption process. To alleviate, in this work, we are presenting a Physically Unclonable Functions (PUFs) for producing a robust security key for digital encryption systems. To note, a correlation function of the scattered perfect optical vortex (POV) beams is utilized to generate the encryption keys. To the best of our knowledge, this is the first report on properly utilizing the scattered POV in optical encryption system. To validate the generated key, one of the standard optical encryption systems i.e., Double Random Phase Encoding, is opted. Experimental and simulation results validate that the proposed key generation method is an effective alternative to the digital keys.