Question: What is the primary purpose of the Generic Bootstrapping Architecture (GBA) as defined by 3GPP, in relation to the existing 3GPP authentication infrastructure?
Option 1: To replace the 3GPP Authentication Centre (AuC) with a more secure alternative.
Option 2: To enable roaming capabilities between different network operators.
Option 3: To leverage the existing 3GPP authentication infrastructure to bootstrap application security and establish shared keys for external applications.
Option 4: To introduce a new protocol for device authentication, separate from the 3GPP AKA protocol.
Explanation: The Generic Bootstrapping Architecture (GBA) utilizes the existing 3GPP authentication infrastructure to provide a means for applications to authenticate subscribers and establish shared security keys, enhancing the utility of the established framework without replacing its core components.