Regex golf, is this a valid PIN?

Charles Curley charlescurley at
Mon Feb 24 20:47:42 MST 2014

On Mon, 24 Feb 2014 18:58:43 -0700
Joshua Marsh <joshua at> wrote:

> Can I ask why it must be numeric? From a security perspective, a 9+
> digit pin seems a bit odd. Traditionally, PINs are short so they can
> be easy to remember. Having a 10 digit number seems like it defeats
> that purpose. Going with 9+ digits seems like an attempt to be more
> security conscious but allowing only digits greatly reduces the
> domain of passwords. I may be missing something, so I'm really
> interested in the use case.

Hmmm, 9 characters, digits only, and easy to remember? I know, I'll use
my SSN.



The right of the people to be secure in their persons, houses, papers,
and effects, against unreasonable searches and seizures, shall not be
violated, and no Warrants shall issue, but upon probable cause,
supported by Oath or affirmation, and particularly describing the
place to be searched, and the persons or things to be seized.
-- U.S. Const. Amendment IV

Key fingerprint = CE5C 6645 A45A 64E4 94C0  809C FFF6 4C48 4ECD DFDB

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