Fig. 10

Tested results about the robustness of the ciphertext against Gaussian noise attack. Decrypted results image from contaminated ciphertexts by Gaussian noises with different noise strengths \(\upsilon\): (a) \(\upsilon = 0.2\); (b) \(\upsilon = 0.4\); (c) \(\upsilon = 0.6\); (d) \(\upsilon = 0.8\); (e) \(\upsilon = 1.0\).