Designing infrastructures that give untrusted third parties (such as end-hosts) control over routing is a promising research direction for achieving flexible and efficient communication. However, serious concerns remain over the deployment of such infrastructures, particularly the new security vulnerabilities they introduce. The flexible control plane of these infrastructures can be exploited to launch many types of powerful attacks with little effort. In this paper, we make several contributions towards studying security issues in forwarding infrastructures (FIs). We present a general model for an FI, analyze potential security vulnerabilities, and present techniques to address these vulnerabilities. The main technique that we introduce in this paper is the use of simple lightweight cryptographic constraints on forwarding entries. We show that it is possible to prevent a large class of attacks on end-hosts and bound the flooding attacks that can be launched on the infrastructure nodes to a small constant value. Our mechanisms are general and apply to a variety of earlier proposals such as , DataRouter, and Network Pointers. Securing User-Controlled Routing Infrastructures
EXISTING SYSTEM:
SEVERAL recent proposals have argued for giving thirdparties and end-users control over routing in the network infrastructure. Some examples of such routing architectures include TRIAD NIRA DataRouter and Network Pointers. While exposing control over routing to third-parties departs from conventional network architecture, these proposals have shown that such control significantly increases the flexibility and extensibility of these networks.
Using such control, hosts can achieve many functions that are difficult to achieve in the Internet today. Examples of such functions include mobility, multicast, content routing, and service composition. Another somewhat surprising application is that such control can be used by hosts to protect themselves from packet-level denial-of-service (DoS) attacks, since, at the extreme, these hosts can remove the forwarding state that malicious hosts use to forward packets to the hosts.While each of these specific functions can be achieved using a specific mechanism—for example, mobile IP allows host mobility— we believe that these forwarding infrastructures (FIs) provide architectural simplicity and uniformity in providing several functions that makes them worth exploring.
PROPOSED SYSTEM:
We improve the security that flexible communication infrastructures which provide a diverse set of operations (such as packet replication) allow. Our main goal in this paper is to show that FIs are no more vulnerable than traditional communication networks (such as IP networks) that do not export control on forwarding. To this end, we present several mechanisms that make these FIs achieve certain specific security properties, yet retain the essential features and efficiency of their original design. Our main defense technique, which is based on light-weight cryptographic constraints on forwarding entries, prevents several attacks including eavesdropping, loops, and traffic amplification. From earlier work, we leverage some techniques, such as challenge-responses and erasure-coding, to thwart other attacks.