To isolate the neural mechanisms associated with recognizing objects from those processing basic visual properties, control stimuli are required that contain the same perceptual properties as the objects but are unrecognizable. We demonstrate that conventional methods for generating control stimuli (phase scrambling, box scrambling, texture scrambling) yield poor controls because they dramatica...

Historically developed for secure communication and military use, CDMA has been identified as a major modulation and multiple-access technique for 3G systems and beyond. In addition to the wide bandwidth and low power-spectrum density which make CDMA signals robust to narrowband jamming and easy to be concealed within the noise floor, the physical layer built-in information privacy of CDMA syst...

The swift progression in internet networking services has led to massive growth in various multimedia applications such as images, audio files, video files etc. This web revolution has made it feasible and simpler to transmit digital media from one point to another with paramount speed and accuracy. Besides this, it is easier to misuse and exploit the valuable information through hacking at the...

In today’s digital world, multimedia content is delivered to homes via the Internet, satellite, terrestrial and cable networks. Scrambling is a common approach used by conditional access systems to prevent unauthorized access to audio/visual data. The descrambling keys are securely distributed to the receivers in the same transmission channel. Their protection is an important part of the key ma...

We systematically investigate scrambling (or delocalizing) processes of quantum information encoded in quantum many-body systems by using numerical exact diagonalization. As a measure of scrambling, we adopt the tripartite mutual information (TMI) that becomes negative when quantum information is delocalized. We clarify that scrambling is an independent property of integrability of Hamiltonians...

Scrambling is the delocalization of quantum information over a many-body system and underlies all quantum-chaotic dynamics. We employ discrete cellular automata as classically simulable toy models scrambling. observe that these break ergodicity, i.e., they exhibit scarring. also find time scale scrambling rises with local Hilbert-space dimension obeys specific combinatorial pattern. then show s...

Investigating the influence of quantum information (QI) scrambling on correlations in a physical system is an interesting problem. In this article, we establish mathematical connections among quantifiers known as scrambling, Uhlmann fidelity, Bures metric and bipartite concurrence. We study these via four-point out-of-time-order correlation function used for scrambling. Further, dynamics all in...

In broadcast service operators would like the viewing of such a sufficiently corrupted video on the screen of the unauthorized viewer to allure potential customers without sacrificing the level of robustness provided by digital encryption techniques.A technique for embedding data in scrambled AVI video is described. The embedding technique is applied to the video sequence jointly with the video...