Security of ABC-F Links

[gamma]

Hi,

im interested in the security of ABC-F network links.
I read somewhere in documentation that the protocol is based on QSIG-GF but there
seems to be no information about used encryption and authentication mechanisms in a
ABC-Network. (there doesnt seem to be one in QSIG-GF either)

Anyone got more information or know where to get more information?

Thanks and greetings,
gamma