Approximate Thumbnail Preserving Encryption
Byron Marohn, Charles V. Wright, Wu‐chi Feng, Mike Rosulek, Rakesh B. Bobba · 2017
Thumbnail preserving encryption (TPE) was suggested by Wright et al. [Information Hiding & Multimedia Security Workshop 2015] as a way to balance privacy and usability for online image sharing. The idea is to encrypt a plaintext image into a ciphertext image that has roughly the same thumbnail as well as retaining the original image format. At the same time, TPE allows users to take advantage of much of the functionality of online photo management tools, while still providing some level of privacy against the service provider.