We have discussed security protocols from IP layer (e.g., IPSec) to application layer (e.g. XML and S/MIME). Network and transport layer security often referred to as a point-point or host-to-host security. Security channels between applications can be defined as an end-to-end security.

Discuss differences between point-to-point and end-to-end security models and security problems they address. Are they redundant?

Can you properly secure your site using only one of them?

What is the drawback of using end-to-end security? Provide examples and arguments to support your viewpoint.