Question: In a 3GPP System Architecture Evolution (SAE) context, what aspect of confidentiality is **NOT** covered by 3GPP specifications for non-3GPP access networks and also applies to device identity in general?
Option 1: User Identity Confidentiality at the access network level & Device Identity Confidentiality
Option 2: Only Device Identity Confidentiality
Option 3: Only User Identity Confidentiality for procedures between UE and Evolved Packet Core
Option 4: Neither, as both are fully covered by 3GPP specifications
Explanation: According to the provided context, the protection of "User identity confidentiality at the non-3GPP access network level" is outside the scope of 3GPP specifications. Additionally, it's stated that "Device identity confidentiality" in general is also outside the scope of 3GPP specifications, making Option 1 the correct answer as it accurately combines both aspects not covered by 3GPP specs.