[ExI] he said what????

Adrian Tymes atymes at gmail.com
Fri Dec 30 20:34:03 UTC 2016


On Fri, Dec 30, 2016 at 12:17 PM, John Clark <johnkclark at gmail.com> wrote:
> NASDAQ inserts a digital time stamp from the National Institute of Standards
> into its financial transactions and then makes a cryptographically secure
> hash out of it, that way anyone can prove when a transaction occurred to
> within a fraction of a second. Perhaps not too far from now it will be
> common practice for cameras, even cell phone cameras, to do something
> similar. That way if somebody produces a video of me making silly faces I
> can produce an older video without the clowning proving it was altered.

Not sure I understand.  What would prevent the faker from just signing
their video with the same time stamp (or rather, a hash produced from
the same time stamp) as the original?



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