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Compressing the encrypted data remains a challenging task in many service-oriented scenarios like distributed processing and cloud computing. This paper presents a new encryption-then-compression scheme using the rate–distortion optimization. The original image is first decomposed via the lifting scheme (LS) into a wavelet pyramid, and the coarsest and detail subbands are then encrypted with the stream...
Compressing the encrypted data remains a challenging task. In this paper, we propose a new compression scheme using the integer lifting wavelet transform (ILWT). In particular, the original image is decomposed with the ILWT, and the coarsest and detail subbands are encrypted via the stream and permutation ciphers, respectively. These encrypted subbands are then transmitted to the third party like...
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