Securing Mobile
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This document proposes securing mobile ad hoc networks through mobility-based clustering and threshold cryptography. It involves three stages: discovery, merging, and maintaining. Threshold cryptography distributes secret data among nodes such that any p or more nodes can access the data, but fewer than p nodes cannot. The algorithm involves nodes calculating stability values, clustering, merging clusters, and maintaining the topology as nodes join or leave. Threshold cryptography combined with clustering could provide a secure key management service for mobile ad hoc networks.
Securing Mobile
- 1. Securing Mobile Ad Hoc Networks through Mobility based Clustering and Threshold Cryptography By A.Prem kumar
- 2. What is MANET? Mobile Ad-Hoc network (MANET) is one where there is no fixed infrastructure such as base stations or mobile switching centers.
- 3. Why it is for ? characteristics of Mobile Ad Hoc networks (MANETs) pose a number of non-trivial challenges to security design.
- 4. Stages of the algorithm 1. Discovery Stage 2. Merging Stage 3. Maintaining Stage
- 5. INTRODUCTION 1. Cluster formation 2. Each cluster Initiates a merging process The threshold security technique uses the (n,p) threshold scheme where some secret data D is divided into n pieces D1,D2,…..Dn in such a way that: 1. Knowledge of any p or more Di pieces makes D easily computable. 2. Knowledge of any (p-1) or fewer Di pieces makes D completely undetermined
- 6. 1.EACH NODE CALCULATES IT’S LOCAL STABILITY VALUE. 2.IF IT’S LESS, THAT ASSUMES STATES OF CLUSTER HEAD 1.Discovery Stage
- 7. 2.MERGING STAGE There are two cases that may initiate a merging process: 1. A non-clustered node requests to join the neighboring clusters. 2. Two neighboring gateways request to merge their clusters.
- 8. 3.MAINTAINING STAGE We first consider two cases that may cause topology changes in MANET and thus invoke cluster maintenancestage: 1. A node switches on and joins the network. 2. A node switches off and leaves the network
- 9. KEY MANAGEMENT SERVICE 1.Efficient secret key schemes are used to secure further communication after nodes authenticate each other and establish a shared secret session key. 2.In a public key infrastructure, each node has a public/private key pair. Public keys can be distributed to other nodes, while private keys should be kept confidential to individual nodes.
- 12. THRESHOLD CRYPTOGRAPHY An (n, p) threshold cryptography scheme allows n parties to share the ability to perform a cryptographic operation (e.g., creating a digital signature), so that any p parties can perform this operation jointly, whereas it is infeasible for at most (p-1) parties to do so, even by collusion.
- 13. Key Management Service K/k
- 14. CONCLUSION 1.The idea of using the threshold cryptography combined with mobility based clustering is worth examining further to establish its full potential. 2.To build a highly available and secure key management service, we propose to use threshold cryptography to distributed trust among a set of servers.
- 15. Queries..?
- 16. THANK YOU