Question: In a USIM's EF5GAUTHKEYS file, when both Service n°123 and Service n°133 are 'available' in EFUST, what additional information (beyond KSEAF for 3GPP access and KAUSF) is included, increasing the minimum file size to at least 110 bytes?
Option 1: Only SOR counter
Option 2: Only UE parameter update counter
Option 3: Both SOR counter and UE parameter update counter, along with KSEAF for non-3GPP access
Option 4: Neither SOR counter nor UE parameter update counter; only KSEAF for non-3GPP access is added
Explanation: According to specifications, when both Service n°123 and Service n°133 are 'available' in EFUST, the file includes additional elements beyond KSEAF for 3GPP access and KAUSF: KSEAF for non-3GPP access, the SOR counter, and the UE parameter update counter. This combination increases the minimum file size to at least 110 bytes, reflecting enhanced security and operational parameters for both 3GPP and non-3GPP accesses in a 5G system context.