  Recent study has shown that compressive sensing (CS) based computationally
secure scheme using Gaussian or Binomial sensing matrix in resource-constrained
IoT devices is vulnerable to ciphertext-only attack. Although the CS-based
perfectly secure scheme has no such vulnerabilities, the practical realization
of the perfectly secure scheme is challenging, because it requires an
additional secure channel to transmit the measurement norm. In this paper, we
devise a practical realization of a perfectly secure scheme by concealing
energy in which the requirement of an additional secure channel is removed.
Since the generation of Gaussian sensing matrices is not feasible in
resource-constrained IoT devices, approximate Gaussian sensing matrices are
generated using linear feedback shift registers. We also demonstrate the
implementation feasibility of the proposed perfectly secure scheme in practice
without additional complexity. Furthermore, the security analysis of the
proposed scheme is performed and compared with the state-of-the-art compressive
sensing based energy obfuscation scheme.
