  By requiring all data packets been cryptographically authenticatable, the
Named Data Networking (NDN) architecture design provides a basic building block
for secured networking. This basic NDN function requires that all entities in
an NDN network go through a security bootstrapping process to obtain the
initial security credentials. Recent years have witnessed a number of proposed
solutions for NDN security bootstrapping protocols. Built upon the existing
results, in this paper we take the next step to develop a systematic model of
security bootstrapping: Trust-domain Entity Bootstrapping (TEB). This model is
based on the emerging concept of trust domain and describes the steps and their
dependencies in the bootstrapping process. We evaluate the expressiveness and
sufficiency of this model by using it to describe several current bootstrapping
protocols.
