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Security Evaluation of Compressible and Learnable Image Encryption Against Jigsaw Puzzle Solver Attacks. (arXiv:2308.02227v1 [cs.CR])
cs.CR updates on arXiv.org arxiv.org
Several learnable image encryption schemes have been developed for
privacy-preserving image classification. This paper focuses on the security
block-based image encryption methods that are learnable and JPEG-friendly.
Permuting divided blocks in an image is known to enhance robustness against
ciphertext-only attacks (COAs), but recently jigsaw puzzle solver attacks have
been demonstrated to be able to restore visual information on the encrypted
images. In contrast, it has never been confirmed whether encrypted images
including noise caused by JPEG-compression are robust. Accordingly, …
attacks block ciphertext classification encryption evaluation image jigsaw jpeg privacy puzzle robustness security