[cryptography] Unbreakable crypto?

Givon Zirkind givonne at gmx.com
Sun Mar 22 10:53:41 EDT 2015


On 3/21/2015 5:18 PM, John Levine wrote:
>> Would a commonly available large binary file make a good one-time pad?
>> Something like ubuntu-14.10-desktop-amd64.iso12 maybe..
> Unlkely for two reasons.  One is that the point of a one-time pad is
> that only the sender and recipient are supposed to have a copy.  The
> other is that something like a Linux distribution has extremely
> obvious regularities, so it wouldn't be hard for a cryptographer
> to figure out what it was.
> The way you make a one time pad is to take a source of actual (not
> pseudo) randomness and record a lot of it in a form that is relatively
> easy to distribute securely, like a DVD-ROM.
> R's,
> John
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