Weekly Updates -1.doc

8/10/2019 Weekly Updates -1.doc

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SECURITY IN MOBILE AD-HOC NETWORKS

The Mobile Ad hoc Networks (MANETs) are most certainly a part of this

technological revolution. A MANET is a collection of wireless devices or nodes

that communicate by dispatching packets to one another or on behalf of another

devicenode! without having any central network authority or infrastructure

controlling data routing. MANET nodes have limitless connectivity and mobility to

other nodes routing! each node acts as a router and network manager to another

node

SECURITY IN MOBILE AD-HOC NETWORKS

The Mobile Ad hoc Networks (MANETs) are most certainly a part of this

technological revolution. A MANET is a collection of wireless devices or nodes

that communicate by dispatching packets to one another or on behalf of another

devicenode! without having any central network authority or infrastructure

controlling data routing. MANET nodes have limitless connectivity and mobility to

other nodes routing! each node acts as a router and network manager to another

node

SCOPE

"n this attempt! we describe and try to implement a method for preventing

wormhole attack called as #ormhole Attack $revention (#A$). All nodes monitor

its neighbor%s behavior when they send &&E' messages to the destination by using

a special list called Neighbor ist. #hen a source node receives some &&E$

messages! it can detect a route under wormhole attack among the routes. nce

wormhole node is detected! source node records them in the #ormhole Node ist.

Even though malicious nodes have been e*cluded from routing in the past! thenodes have a chance of attack once more. Therefore! we store the information of

wormhole nodes at the source node to prevent them taking part in routing again.

Moreover! the #A$ has the ability of detecting both the hidden and e*posed

attacks without special hardware.


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+. ,etting up a simulation of Mobile Ad-hoc Network (MANET) implemented

using A-/0 N EMAN 1E0T& (A1) routing protocol.

2. "mplementing a #&M/E attack in the simulated MANET.

3. etection and prevention of #&M/E attack in the simulated MANET

using #&M/E ATTA04 $&E1ENT"N (#A$) algorithm.

The detection of wormholes in ad hoc networks is still considered to be a

challenging task. Thus! in attempt of implementation! we propose an algorithm to

detect and prevent wormholes using #A$ algorithm.

#e achieve this through the use of the neighbor node monitoring method of each

node and wormhole route detection method of the source node on the selectedroute. ur mechanism is implemented based on the A1 protocol and with the

help of simulation results we will try to infer the efficiency of the same.


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,econd #eek

AODV Protocol

5 On-demand protocol, similar to DSR

5 Basic idea

6 Integrate DSDV(hop by hop) and DSR (on demand)

6 he ro!ting table only maintains the ro!ting in"ormation needed,

instead o" #eeping the entire ro!ting table (li#e DSR)

6 he ro!ting in"ormation is recorded into the ro!ting table o" the

intermediate ro!ter along the path, so the data pac#et only contains

the destination address (li#e DSDV)

5 $o phases%

6 Ro!te Disco&ery ' Ro!te aintenance

Ro!te Disco&ery

5 Ro!te disco&ery stage

6 hen the ro!te is needed, the so!rce sends the RR*+ pac#et in a

controlled ooding manner thro!gho!t the net$or#

6 Intermediate node chec#s its ro!ting table

5 I" $ith the ro!ting in"ormation, reply to destination $ith the

RR*P pac#et

5 other$ise, the intermediate "or$ards RR*+ pac#et to its

neighbors

6 inally, the destination or some intermediate nodes $ill reply the

ro!tes to the so!rce


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Route Discovery

./ 0ode S needs a ro!te to D in order to send data pac#ets to D

./ 0ode S needs a ro!te to D in order to send data pac#et to D

1/ 2reates a Ro!te Re3!est (RR*+)

*nters D4s IP addr, se35,

S4s IP addr, se35

hopco!nt (67)


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2reates a Ro!te Re3!est (RR*+)

*nters D4s IP addr, se35,

S4s IP addr, se35

hopco!nt (67)

8/ 0ode S broadcasts RR*+ to neighbors

0ode A recei&es RR*+

a#es re&erse ro!te entry "or S

dest 6 S, ne9thop 6 S, hopcnt 6 .


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0ode A recei&es RR*+


dest 6 S, ne9thop 6 S, hopcnt 6 .

It has no ro!te to D, so it rebroadcasts RR*+

/ 0ode 2 recei&es RR*+


dest 6 S, ne9thop 6 A, hopcnt 6 1

It has a ro!te to D, and

the se35 "or ro!te "or D is :6D4s se35 in RR*+


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0ode 2 sends RR*P

2 creates a Ro!te Reply (RR*P)

*nters D4s IP addr, se3 5

S4s IP addr, hopco!nt to D (6.)

;i"etime


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3rdWeek

Route Maintenance

;in# bet$een 2 and D brea#s do$n

2 can per"orm local repair "or the ro!te to D

ethods to detect lin# brea#age

. =ello essage, RR*P $hose ; is one

1 ;1 rigger

;in# bet$een 2 and D brea#s do$n

2 can per"orm local repair "or the ro!te to D

1/ 0ode 2 in&alidates ro!te to D in ro!te table


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>

/ 0ode 2 creates Ro!te *rror (R*RR) message

2 creates a Ro!te *rror (R*RR)

*nters Dest2o!nt (6.), D4s IP addr, se3 5

;ists all destinations $hich are no$ !nreachable

?Dest2o!nt@ eld indicates the n!mber o" !nreachabledestinations incl!ded in the R*RR message/


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or$ards R*RR to S

0ode S recei&es R*RR

2hec#s $hether A is its ne9t hop on ro!te to D

Deletes ro!te to D

Redisco&ers ro!te i" still needed


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4thWeek

AODV Message Formats

Route Request (RREQ) Message Format

Route Reply (RREP) Message Format


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Route Error (RERR) Message Format


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thand Cthee# e9plain or# hole attraction algorithm

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