Key Security Position And Security

Initially, an exchange protocol, such as a password- authenticated key exchange protocol, is used to create a shared secret. From the shared secret, two keys are created: a utilized key and a stored key. The utilized key is used to encrypt messages between nodes. When it is time to replace the utilized key to maintain security, the stored key is utilized to encrypt messages for generating/distributing a new shared secret. The new shared secret is then used to generate a new utilized key and a new stored key. This process may be repeated any number of times to maintain

The key distribution center comprises of two components, integrated into one server. These components are the authentication server and the ticket-granting server. Considering three entities, that is, the resource center, client and user Z, the request and authentication process works in the following way. The user Z feeds in a username and password into the client machine, which is encrypted to form a secret key. The user Z through the client then contacts the authentication server, which in turn sends the

As shown in figure 11, two users trying to communicate, denoted as A and B, first exchange their public keys, denoted as Y (NIST). Figure 11. “The Steps of KEA” Once received, A and B validate YB and YA, respectively, to ensure that it belongs to a valid user on the network (NIST). If it’s valid, A and B generate rA and rB, respectively (NIST). These r’s are used in the equations RA = g^rA (mod p) and RB =

The key-authorities generate private key to the users by giving its own master secret key. When multiple key-authorities are available then each key-authority generates their own attributes individually with their own master secret key. Thus key-authorities are in the first place to keep the data confidential. This is the first security requirement.

Abstract— this paper is an involvement in the field of security study on mobile ad-hoc networks. Boundaries of the mobile ad hoc nodes have been considered in order to design a secure Geographic routing protocol that thwarts selfish and flooding attacks. We took the base of Ad hoc On Demand Routing Protocol (AODV); the most popular Routing protocol. The significance of the proposed protocol that should make sure security as wanted by providing a broad architecture of Secured PPEM Mechanism based Multi-Hop Strong Path Geographic Routing protocol (SMHSP) based on effective key management, secure neighbor detection, secure routing data’s, finding malicious nodes, and eliminating these nodes from routing table. Our results clearly show that our secured Geographic routing protocol increases the throughput and packet delivery ratio while it has a tolerable increase in the routing overhead and average delay. Also, security study proves in details that the proposed protocol

Hao, Y., Cheng, et Al“A distributed key management framework with cooperative message authentication in VANET In [10] The OKD scheme is a centralized group key management protocol and uses periodic rekeying to decrease the communication cost. The OKD scheme constructs the key tree with one-way key approach and derives the new key from the old one to improve the rekeying efficiency. There are internal k-nodes, external k-nodes, and members in each group (u-nodes). In the tree, the internal k-node stores the auxiliary key and the external k-node stores the secret key for each u-node. The secret key is only known by the

Most of the current approaches are limited by focusing on enforcing anonymity at a heavy cost to precious resources because public-key-based encryption and high traffic generate significantly high cost Vehicular Ad Hoc Networks (VANETs) and Mobile Ad Hoc Networks (MANETs) use anonymous routing protocols that hide node identities and/or routes from outside observers in order to provide anonymity protection. However, existing anonymous routing protocols relying on either hop-by-hop encryption or redundant traffic either generate high cost or cannot provide full anonymity protection to data sources, destinations, and routes[7].

This model does not have a dealer, and set of participants, but has only source and destination who wish to share a secret key between them because the aim of this model is to share a secret key between the two end parties to communication. Source plays the role of dealer and destination plays the role of set of participants. Source chooses the secret key to be shared with the destination, partitions the secret key into ‘n‘ shares using Shamir‘s secret sharing scheme [24], where ‘n‘ is the number of disjoint paths exists between source and destination. Source calculates the ‘t‘ commitments to the coefficients of ‘t-1‘degree polynomial and transmits the shares and commitments to the destination

Abstract: Continuous user authentication is a critical prevention-based methodology with protect high security mobile ad-hoc networks (MANETs). Certificate revocation is an important security component in MANETs. A new method to enhance the effectiveness and efficiency of the scheme by employing a threshold based approach to restore a node’s accusation ability and to ensure sufficient normal nodes to accuse malicious nodes in MANETs. The user’s available relevant information on the system, and express an architecture that can be applied to a system of systems. Ad-hoc networks are an emerging area of mobile computing. In this paper, we attempt to analyze the demands of Ad-hoc environment. We focus on three areas of Ad-hoc networks, User Authentication, Ad-hoc routing, and intrusion detection.

MANETs will be consisting of many digital devices, in which the node exhibits mobile nature. This has been a great challenge for researchers to build MANET where peer to peer communication has its own advantages as it reduces the overhead of maintain and monitoring an centralized servers. Due the rapid growth of interest of mobile users towards social networking applications, that allows them to share their files. This results in increase in number of mobile users to get used or joining such networks day by day.

Generally, every public-key digital signature schemes is based on a mathematical problem. This problem is known as NP (Non-deterministic polynomial) hard problem. The problem is considered to be an NP hard mathematical problem if the validity of a proposed solution can be checked only in polynomial time.

Wireless communication and mobility introduced a new paradigm in Distributed Systems. We examined short-range wireless data transmission using mobile agent (developed using Android OS). Presence of mobility in distributed systems introduces new challenges of reliable and secure communication. In this project, we propose a secure way of communication via wireless network (comprised of P2P nodes) – Bluetooth and secure the data transmission using asymmetric cryptograph.

When one submits a request for information to a service, it being a HTTP or a SOAP request SMTP or other protocols, one must ensure that the service is indeed the entity that it claims to be (Rouse, 2013). In public key encryption, the verification of the public key origin is especially important when one is submitting encrypted information over the internet which it may be sensitive. Digital Certificates are the main method to verify identity of entities holding public keys rendering services over the internet (Image 1) (Rouse, 2013).

Sometimes, people want to keep their information as authentic and secure as possible. This calls for the use of a few protocols that makes this a success. To achieve it, one can either make use of the AH or even ESP. research shows that the two can be used together or even separately. This essay will focus on the functionality of AH and ESP, their main activities and their advantages over each other.

With ever increasing on road traffic and dynamic nature of road conditions an intelligent transportation system (ITS) is essential. Vehicular ad-hoc networks (VANETS) takes the responsibility in implementing ITS and is a promising communication scenario for traffic management and safety. VANETs possess unique characteristics like high mobility of nodes, rapid change in the neighbor nodes, stringent deadline for authentication, association times, no fixed infrastructure etc. Though VANETs closely resembles Mobile Ad-hoc Networks traditional security mechanisms are not suitable. This dissertation aims to describe and analyze the most representative VANET security developments and propose an efficient implementation focusing on key exchange and key management aspects, simulating and evaluating the same in OPNET environment.