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Re: minimum number of days between password change



On 11/2/2010 9:40 PM, Jesús M. Navarro wrote:
Hi, lee:

On Tuesday 02 November 2010 21:26:54 lee wrote:
On Mon, Nov 01, 2010 at 06:29:03PM -0500, Ron Johnson wrote:
On 11/01/2010 04:45 PM, Jesús M. Navarro wrote:
Hi, Ron:

On Monday 01 November 2010 18:49:01 Ron Johnson wrote:
[...]

If someone learns my password on day 2, they have full access to my
account for 74 days, or I must beg for SysAdmin help?

"Minimum number of days" isn't a very bright idea.

It is, for a low minimum number.

The rationale is to avoid the user reusing passwords: Ok, so my password
is 12345678 and I must change it now?  Let's do it: 87654321; but
immediately I change back again.

The way to do it is to have a record in your password db of the
hashes of each user's last N passwords.

Not a serious expert, but: Bad policy? (Keeping unnecessary histories of *anything* would tend to weaken security. Wouldn't it?)


BTW, how do you do that?

AFAIK you can't, at least with files backend (but that's a different issue).



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