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Google has a bunch of apps like Google+, Gmail, Docs, Reader, etc. Internally, these apps must talk to each other securely to query information/data. I am wondering conceptually how Google implements this secured authentication and authorization among their apps internally. Does anyone know about this?

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closed as off topic by Alex, phwd Aug 16 '12 at 2:06

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1 Answer

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They use OAuth2 for authentication and authorization. There are some slight variations on certain services, for example Google Drive. It depends on exactly which service you want to use.

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