On Jun 09 01:18, Chris Barnes wrote:
> Jason <[EMAIL PROTECTED]> wrote:
> > Is testing for gibberish in email address worth attempting?
>
> Just a quick note: alot of universities use an automated scheme for the
> email addresses they give their students. For example, for the longest
> time my email address was cnb1234 (initials + last 4 of their student ID
> #). If someone else came around with the same initials and last 4,
> their address was cnb123a.
>
> All I'm saying is that you might be elminating alot of legit
> addresses...
I think Jason's got an interesting idea, in measuring the frequency
of the changes. The first example only has a single change over 7
characters; the second example only has two changes in 7 characters.
But I don't think the technique is actually that reliable, and it's
also subject to easy defeat (just reduce the frequency of the changes).
Furthermore, many spam random strings don't actually contain that many
changes.
My current spambox has the following totally random strings in the
usernames of the from:
j7kt12ffm ov1zq9yam tdofetzkkeud trtjnp2a5523 cindielrgv
bjuplquqp ppc3wzrt1y2j 260ufb4y8 snv50pnoec sknr9tg0
sz6fq0sj5bgs ri8b7y2m2z6i qup9gm2io5hx i76ize4g og3xg440i5m
08o03hdjf jynvjda6 j9s6ccoid jhlk6v19 lmnqoxo4r6
This is an interesting case of a human immediately being able to see
that they're gibberish, but it's not nearly so apparent to a computer.
-- Lydia
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