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Definition of "FDE" |
Full-disk encryption (FDE) is encryption at the hardware level. FDE works by automatically converting data on a hard drive into a form that cannot be understood by anyone who doesn’t have the key to “undo” the conversion. Without the proper authentication key, even if the hard drive is removed and placed in another machine, the data remains inaccessible. FDE can be installed on a computing device at the time of manufacturing or it can be added later on by installing a special software driver.The advantage of FDE is that it requires no special attention on the part of the end user after he initially unlocks the computer. As data is written, it is automatically encrypted. When it is read, it is automatically decrypted. Because everything on the hard drive is encrypted, including the operating system, a disadvantage of FDE is that the encrypting/decrypting process can slow down data access times, particularly when virtual memory is being heavily accesse. |
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