A group of IBM researchers has released a Github project that implements a homomorphic encryption system –a way to work on encrypted data in a file without first decrypting the whole file.
Why would anyone want to do that? Partly because if you have to decrypt the file to work on it, it's going to exist as plaintext somewhere. IBM has other ideas about this as well: leaving the encrypted file encrypted would keep data protected in the cloud while still letting users work on it.
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