Assuming this actually works, it's an attempt to execute the plan in cryptonomicon -- secure data storage immune to government inspection. Dropbox could, of co

Assuming this actually works, it's an attempt to execute the plan in cryptonomicon -- secure data storage immune to government inspection. Dropbox could, of course, have implemented something similar if it weren't trying to do deduplication. Assuming you are doing deduplication, it would be neat to be able to -- say -- insert a DVD into your dropbox-based DVD ripper and discover the operation had completed instantly...