Pure Python Data Mangling or Encrypting
Robert Kern
robert.kern at gmail.com
Sat Jun 27 04:07:21 EDT 2015
On 2015-06-27 08:58, Robert Kern wrote:
> On 2015-06-27 04:38, Steven D'Aprano wrote:
>
>> Maybe you use Python's standard library and the Mersenne Twister. The period
>> of that is huge, possibly bigger than 256! (or not, I forget, and I'm too
>> lazy to look it up). So you think that's safe. But it's not: Mersenne
>> Twister is not a cryptographically secure pseudorandom number generator. If
>> I can get some small number of values from the Twister (by memory,
>> something of the order of 100 such values) then I can predict the rest for
>> ever.
>
> 634.
Bah! 624.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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