Security of Data on Disk – Computerphile

Deleting files may not mean they’re gone. Even overwriting them isn’t safe. Professor Derek McAuley explains.

EXTRA BITS – more on Flash/SSD:
Punch Card Programming:

This video was filmed and edited by Sean Riley.

Computer Science at the University of Nottingham:

Thanks to Richard Faulkner for the photo of the hard disk being destroyed.

Computerphile is a sister project to Brady Haran’s Numberphile. See the full list of Brady’s video projects at:

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