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Each of the M content features x i is encrypted by adding R entries of the encryption LUT identified by the indexes (t i0,…,t i(R−1)), obtaining the encrypted feature c i as follows begin{array}rcl@ c_{i} & = & x_{i} + sum_{h=0}^{R-1} mathbf{E}(t_{ih}).
An encryption algorithm for a feature has been then designed to ensure the parameterization, topological and geometrical validity, and self-adaptability of the encrypted feature.
Joint decryption and watermarking is performed by generating the same sequence of indexes t ih according to the content dependent key sek and by adding R entries of the decryption LUT D k to each encrypted feature c i as y_{k,i} = c_{i} + sum_{h=0}^{R-1} mathbf{D}_{k}(t_{ih}) = x_{i} + sum_{h=0}^{R-1} mathbf{W}_{k}(t_{ih}) = x_{i} + w_{k,i} (3).
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The output of this procedure is a set of watermarked and encrypted features that are sent to the buyer.
DCT would allow a large number of processing tasks to be carried out on encrypted images, like the extraction of encrypted features from an encrypted image, or watermark embedding in encrypted images.
Fox tells me that when the chat is end-to-end encrypted, features like smart replies and the Google Assistant simply can't work because Google's algorithms can't see the content of the chats, either.
What they said they needed were customer passwords – which were sent securely – so that they could access the plain-text versions of messages from customers using my company's encrypted storage feature.
Facebook already offers a "Secret" encrypted messaging feature that includes an Unsend expiration timer.
Line patched the issue, and it has since introduced an encrypted chat feature, but anecdotally I've never seen anyone actually use it beyond the day it was launched.
With these methods [10 12], the content owners can extract the features from the images and then encrypt the features and images separately before outsourcing.
Voice-focused messaging app Voxer has added an end-to-end encrypted 'private chats' feature on its Android and iOS apps — powered by Open Whisper Systems' Signal Protocol.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com