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Two-factor banking
Kelly Martin, 2005-10-18

People who lived through the Second World War, like my grandparents, had a very different view of money than those of us who grew up in the Information Age. Many of us still remember being told how foolish it is to keep one's life savings under a bed mattress, because the banks were known as trusted entities that will always do a better job of looking after your money. Even my grandparents, albeit reluctantly, came to realize that putting trust in financial institutions was the only way to go.

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Two-factor banking 2005-10-18
Anonymous (3 replies)
Re: Two-factor banking 2005-10-19
Anonymous
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Anonymous
Re: Two-factor banking 2006-04-13
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Two-factor banking 2005-10-19
Todd Knarr (2 replies)
Re: Two-factor banking 2005-10-19
Anonymous (1 replies)
Re: Re: Two-factor banking 2005-10-19
Todd Knarr (1 replies)
My suggestion directly addresses your first and third points. If the user can readily tell whether he's talking to the real bank or not when he goes to a site purporting to be the bank, it becomes much more difficult for phishers to successfully fool the user into giving away their credentials.

As for your second point, the whole purpose of a credential exchange is to establish identity. The bank has to accept that anyone who can successfully present credentials for a given user is that user. Two-factor authentication strengthens the credentials, but the bank still has to grant access to someone who successfully presents both parts of the credentials. If I can impersonate the bank's site, I can get the user to give me both parts of the authentication without much trouble. I then use them immediately while presenting the user with a pause and an "authentication failed" or "site is currently down for maintenance, try again later" screen.

Preventing a man-in-the-middle attack requires that both ends prove their identities. Strengthening user authentication won't help simply because it's not the user being impersonated here.

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Link to this comment: http://www.securityfocus.com/comments/columns/363/32546#32546
Re: Re: Re: Two-factor banking 2005-10-19
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