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Hi all,

I have a shop system that sends out orders to a shipping company. The shipping company need to access a webpage that contains a confirmation note that contains all the purchaser's shipping and order details. This webpage will be accessed via a link from an email.

They feel it will be too annoying (process-wise) to have a username/password for this page and so the obvious problem is how do you stop jo public (or jo hacker) from accessing someone else's personal info?

I was thinking about using a hash of certain parts of the order (eg. purchaser's email address/order number/time of order) in the query string to authenticate the user. Any comments on how secure this is? Could a bot attack this and come across a valid query string to access this data?

Thanks, Damien
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