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Yes: Windows EFS at least, can be used that way. Each file is encrypted with a unique, random key and that key is the encrypted once for each user who has access to the file and the result is stored in the NTFS alternate data stream of the file So, as long as the NAS supports NTFS, you can use EFS on it and the actual file storage server will never see the ...


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The resulting secret value (the list of filenames to show the concatenation order) would take up more space than the original file. You'd be better off simply using a one-time pad, and keeping that secret... or even keeping the original file secret directly. Your method would work in most cases, in the sense that anyone who possessed the randomly-named ...


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Known-Plaintext Attack A known-plaintext attack is a technique for determining the key of an encrypted block of data based up a known plaintext that was encrypted to a known ciphertext. Some modern symmetric encryption algorithms are susceptible to this type of attack. There are also [chosen-plaintext attacks] where the attacker chooses plaintexts to be ...


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Pretty much all mail systems have a limit on email size. You can howevr overcome it by splitting your big file in several mails. As for policy, you should read the terms of use of each provider to figure out. For instance GMail restricts (restricted?) usage of third-party applications to avoid that you use GMail as a virtual drive (there were several ...


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The information stored on a handset using HCE for contactless payments is probably limited in some ways (time, usage or both). Take Google Wallet (the HCE-version): Google states that You will need to be connected to the internet in order to unlock the app with your 4-digit security PIN and tap and pay in stores. However, if you set your PIN timeout in ...



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