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Mechanical resonators with “soft” phononic clamping dilute the material's intrinsic dissipation by five orders of magnitude. Decoherence rates comparable to trapped ions ensue, enabling quantum optomechanical experiments with multimode hybrid systems.
This work investigates the security of optical ciphers integrating compressed sensing (CS) with double random phase encoding. Theoretical analysis demonstrates that the combined system, regardless of the implementation order of the two procedures, can be normalized as a single CS projection process, whose equivalent measurement matrix can be recovered by plaintext attack. The proved restricted isometry...
We demonstrate an optomechanical system with quantum cooperativity Cq = 4g2/κγ >> 1 already at moderate cryogenic temperature [1]. It is realised as a membrane-in-the-middle system [2] with a high-stress silicon nitride membrane. Here, y = kBT/ħQ is the quantum decoherence rate of the mechanical system due to its thermal bath at temperature T∼4 K, and Q∼107 the mechanical quality factor. In...
This paper presents the cryptanalysis of optical ciphers combining double random phase encoding with permutation techniques, and shows its vulnerability against plaintext attack regardless of the implementation order of the two procedures. The equivalent secret keys of both the combination fashions can be retrieved, instead of the recovery of random phase masks and permutation matrix. Numerical simulations...
Spatial data in the military field has a higher sensitivity, confidentiality characteristic. This paper brings the spatial expansion of the model after combining the traditional mandatory access control model with role-based access control model, proposes a SRMAC (Spatial-data Role-based Mandatory Access Control) model, researches the operating mechanism of SRMAC model, uses this model in the implementation...
With the development of smart grid, the interaction between the user and the power service agencies is becoming more and more important. In this paper, a Smart Grid Integrated Interactive Terminal (IIT) was designed and the process of hardware design and software design are presented. Furthermore, based on the hardware PCB board of IIT, a Fully-automated demand response (ADR) model based on Open Automated...
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