# Re: Black box algorithm solution

*From*: Stephen Horne <sh006d3592@xxxxxxxxxxxxxxxx>*Date*: Sun, 28 Sep 2008 20:13:50 +0100

On Sun, 28 Sep 2008 15:09:44 +0000 (UTC), Waldek Hebisch

<hebisch@xxxxxxxxxxxxxxxx> wrote:

Reconstructing algorithm for such

routine is equivalent to guessing password in reasonable number

of trials.

Password cracking software routinely does precisely that. A

"reasonable number" of trials may potentially be billions even on a

home PC, or many orders of magnitude greater in some contexts,

depending on the time and resources available and the expected benefit

from breaking the password.

The combinatorial explosion obviously implies limits, and those limits

are very quickly reached, but a lot can be done in practice if only

because many interesting black boxes simply aren't that complex.

.

**References**:**Re: Black box algorithm solution***From:*Waldek Hebisch

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