  To secure the digital images over insecure transmission channels, a new image
encryption algorithm Noise-Crypt is proposed in this paper. Noise-Crypt
integrates non-linear random noise, hybrid chaotic maps, and SHA-256 hashing
algorithm. The utilized hybrid chaotic maps are the logistic-tent and the
logistic-sine-cosine map. The hybrid chaotic maps enhance the pseudorandom
sequence generation and selection of substitution boxes, while the
logistic-sine-cosine map induces non-linearity in the algorithm through random
noise. This deliberate inclusion of noise contributes to increased resistance
against cryptanalysis. The proposed scheme has been evaluated for several
security parameters, such as differential attacks, entropy, correlation, etc.
Extensive evaluation demonstrates the efficacy of the proposed scheme, with
almost ideal values of entropy of 7.99 and correlation of -0.0040. Results of
the security analysis validate the potency of the proposed scheme in achieving
robust image encryption.
