E.2 Introduction

24.1093GPPBootstrapping interface (Ub) and network application function interface (Ua)Protocol detailsRelease 17TS

E.2.1 General

A bootstrapping session established using a bootstrapping procedure (cf., clause 4 and annex A) is used between a UE and a PKI portal. The BSF provides to the PKI portal a NAF specific key material (Ks_NAF or Ks_ext_NAF) which is derived from the key material (Ks). The PKI portal uses this key to authenticate and optionally secure (i.e. integrity protect and encrypt) the communications between it and the UE. The BSF will also provide the PKI portal the expiration time of the bootstrapping session.

E.2.2 Key required to interpret signalling flows

The key to interpret signalling flows is specified in clause A.2.2.