Importance

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Abstract

Embodiments of the present invention are directed to multiple-factor authentication for accessing a cloud service from end-user devices. Authentication can be account-based, carrier-based or a combination thereof. Upon a first activation of a client application on an end-user device, the application first takes the user through a multiple-factor authentication process. Thereafter, upon each subsequent activation of the client application, the client application automatically obtains an identifier from the device and provides at least the obtained identifier to a server providing the cloud service. The server determines whether the identifier matches one of previously stored identifiers in the user's account. A previously stored identifier can be a unique device identifier of an “allowed” device or can be a carrier supplied identifier of a user. Based on the determination, the server automatically allows the device access to the cloud service without other user input.

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First Claim