passport

What is the difference between Microsoft Passport and OpenID?

OpenId is open source and can be implemented by anyone. In both cases my credentials are held on a third party server. The only advantage I can think of for using Microsoft Passport is the reliability of Microsoft. ...

How to validate a passport?

Well I have been asked to validate passport numbers (the documents used on airports to travel to other countries). My question is: What format are these "numbers"? All I know is that they can have letters but I am not finding any place defining the rules. Any pointers/Links? ...