A direct interpretation of the term Internet of Things refers
to the use of standard Internet protocols for the human-to-thing or thing-
to-thing communication in embedded networks. Although the security
needs are well-recognized in this domain, it is still not fully understood
how existing IP security protocols and architectures can be deployed. In
this paper, we discuss the applicability and limitations of existing Inter-
net protocols and security architectures in the context of the Internet of
Things. First, we give an overview of the deployment model and general
security needs.We then present challenges and requirements for IP-based
security solutions and highlight specificl technical limitations of standard
IP security protocols.