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Re: User ID generation

Subject: Re: User ID generation
Date: Mon, 18 Apr 2005 03:15:05 +0000
After the first or second attempt require the user to enter some
random letters that appear in a graphic. Try www.gmail.com. After a
few bad logins it makes you enter letters from a graphic. That will
keep bots from retrying without human intervention.
~Paul

On 4/12/05, Jason binger <cisspstudy@yahoo.com> wrote:
I have a customer that generates UserIDs as numbers
sequentially for a critical application. They
implement account lockout and I am concerned that
someone could launch a DOS and lockout all the user
accounts.

What would people recommend for a user ID generation
method.

I was thinking UserIDs should be randomly generated
from a large alpha-numeric keyspace, but how big
should the keyspace be?
What would the size of the keyspace need to be if it
was only numeric?

Any other thoughts appreciated.

Cheers,


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