Abstract
To solve the problem of privacy leakage and response latency in outsourced image watermark embedding in cloud computing, an efficient and privacy-preserving watermark embedding method for outsourced digital images was proposed by introducing edge computing technology. We had proposed a perturbing encryption method with homomorphism to ensure the information security and the correctness of discrete wavelet transformation in the encrypted domain. In addition, the framework was designed to guarantee the safety of singular value decomposition that edge server could not recover the original image matrix. The experimental results show that the proposed method is superior to similar secure watermarking schemes in terms of encryption/decryption time and ciphertext expansion. The proposed method enables the watermarking operation to be performed in an unsafe outsourced environment while achieving a watermarking effect similar to the plaintext equivalent.
Highlights
T HE development of artificial intelligence and big data has prompted an explosion of information
We introduced edge computing technology to propose a lightweight privacypreserving digital watermarking method for outsourced host images
We briefly introduce the calculation process for Haar discrete wavelet transform (HDWT) and inverse-HDWT(IHDWT)
Summary
T HE development of artificial intelligence and big data has prompted an explosion of information. Zheng et al [31] combined the Paillier cryptosystem [32] to propose a DWT transformation in the encrypted domain Their data reduction method presented some consistent pixel ciphertext that resulted in a risk of information leakage. This implies that data processing outsourced to the cloud may cause a response delay [37] To solve this problem, we introduced edge computing technology to propose a lightweight privacypreserving digital watermarking method for outsourced host images. TTP distributes key parameters, CO encrypts and uploads data to the edge server, the edge computing server performs secure HDWT and SVD, and AU decrypts the ciphertext to obtain the plaintext of the image with the watermark.
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