This blog does not deal with the Internet security side of the equation very often, but I saw a post on the Hyperion Digital Identity Forum that I thought was interesting.

According to that post eBay in the United Kingdom may now be implementing a location based authentication scheme which aims to protect its users from being hacked. This is an interesting step towards account protection, provided of course that you never access your eBay account on business trips or vacations.

Perhaps the best way to implement this would be on an opt-in basis?