Secure WebServices in ASp.Net

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hi all,
I am using a webservices which accept userId from one website and pass it to second website. How I will perform this operation in secure way.

Posted 30-Jul-10 2:24am

ranjansingh235

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*dan!sh* · Accepted Answer · 2010-07-30T02:29:00

Solution 1

You can encrypt the userId before sending the request and decrypt it as the message is received.

See this[^] article.

Posted 30-Jul-10 2:29am

dan!sh

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ranjansingh235 30-Jul-10 8:57am

Thanks d@nish

Yusuf · Accepted Answer · 2010-07-30T03:12:00

Solution 2

Do you have a control of the two websites? If so, don't encrypt the userID when passing to the second website. Instead we do the following in similar situation.

User passes User ID to authentication webservice. The authentication webservice only responds on SSL. Once we authenticate the user, we create temporary GUID and pass it to the second website, which can verify the validity of the GUID and translated back to the user ID. That way not userID is stolen or replicated.

Posted 30-Jul-10 3:12am

Yusuf

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ranjansingh235 31-Jul-10 0:26am

Thanks for answering my question,
Actually I don't have enough control on first website which is developed in php. They provide a link when user click on that, user navigate to our website where we check userid. If he is authorized to access our website then he don't have to login on our website and can seamlessly access our website. The question is that how can we pass userid from website one to website two.