Hi Michael,

Interesting idea. Not unlike the way credit card companies will
sometimes phone you before authorizing a large transaction (never
happened to me, but they claim they do it). I think this is good as
supplemental authentication, but the delay waiting for the email and
such probably make it unsuitible as the main authentication technique.
In addition, if it is the ONLY authentication technique, then compromise
of the email account means compromise of all accounts using this
authentication.

Perhaps an interesting variation would be to SMS a pass code to a mobile
phone.

In fact, PayPal do something which is kind of similar. When you join,
they bill your card the membership fee, and put a random code in the
originator's reference. When you receive your bill and supply this
reference back to PayPal, your account is upgraded to "verified" status.
Very sensible precaution.

Regards,

Paul

Michael Silk wrote:

>Hi,
>
> Just a quick little article about a login system that, should (i
>think :)), prevent phishing attempts on your site.
>
>
>http://michaelsilk.blogspot.com/2004/11/article-solution-to-phishing.ht
m
>l
>
> Have a look at it and let me know what you think ... and apologies
>to anyone if an idea like this is already out there :)
>
>-- Michael
>
>
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--
Paul Johnston
Internet Security Specialist
Westpoint Limited
Albion Wharf, 19 Albion Street,
Manchester, M1 5LN
England
Tel: +44 (0)161 237 1028
Fax: +44 (0)161 237 1031
email: paul (at) westpoint.ltd (dot) uk [email concealed]
web: www.westpoint.ltd.uk

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