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Important files can be encrypted with the use of a program (many of which are free) then sent to others (as an e-mail attachement, or a stored file on a web storage site like 4Shared or OpenDrive. The decryption key can either be sent separately (which is not the safest, but is better than no encryption at all), or the recipiant can be made aware of the decryption key beforehand (preferably by personal conversation, so there is no digital record,) which is generally much safer.

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Elias Wolf

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Q: How can data encryption can be used to transfer data securely?
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