1 research outputs found
Cryptographic key distribution over a public network via variance-based watermarking in compressive measurements
The optical communication has an increasing need for security in public
transmission scenarios. Here we present a protocol for cryptographic key
distribution over a public network via photon-counting compressive imaging
system with watermarking, which utilizes watermarking technique to distribute
secure keys, and uses reconstructed images for simultaneous identity
authentication and tampering identification. The watermark is embedded in the
rearranged compressed measurements of the object, and then the signal is
transmitted through a public network. At the receiving terminal, the legitimate
users can easily extract the watermark as the cryptographic key by using
initial keys and the variance characteristic of random measurements. Artificial
tampering and attacks can be detected by the accurately retrieved images. The
realization of this protocol is a step forward toward the practical
applications, and will be beneficial for the broader fields of optical security
in many ways.Comment: 13 pages, 7 figure