Informatics Publishing Limited

T. Prabakaran ¹, I. Thahirabanu ¹, G. Usha ¹, G. Vishnupriya ¹

Affiliations
1 SNS College of Technology, IN

Abstract

The regular SQRT CSLA consists of two RCA blocks with carry input as 0 and 1.The Final sum will be selected from multiplexers (MUX) by the carry out generated by the pervious block. This paper, proposes an area and delay efficient carry select adder with logical reduction of excess redundant hardware. In the proposed architecture, we had implemented the RCA with carry input as 1, only with MUX, OR gate and AND gate. For 16-bit regular SQRT CSLA there is a reduction of basic logic gates from 434 to 323.The delay is reduced by replacing Full-adder with half-adder in first bit of every RCA in the proposed architecture. This will reduces the number of Iterations required to get the final sum. The proposed architecture shows that there is reduction of area and delay. Based on this architecture, we designed 4-bit,8-bit,16 -bit and 32-bit Square-ischolar_main CSLA (SQRT CSLA) and compared with the regular SQRT CSLA. In this work, we evaluated the performance of the proposed design in 90-ηm CMOS Technology in Xilinx Tools. The result analysis shows that, the proposed SQRT CSLA of 4-bit, 8-bit 16-bit and 32-bit has a reduction of 31.74%, 30.13%, 21.92% and 21.76 % respectively compared with regular SQRT CSLA in area. The delay of Proposed SQRT CSLA of 4-bit,8-bit 16-bit and 32-bit are reduce by 27.47%, 17.23%, 14.32% and 11.63% respectively.

Keywords

Application-Specific Integrated Circuit (ASIC), Carry Select Adder (CSLA), Logic Reduction, Redundant Hardware, Ripple Carry Adder(RCA), Arithmetic Logic Unit(ALU)[2].

Full Text

     

G. Usha ¹, K. Mahalakshmi ¹

Affiliations
1 Karpagam College of Engineering, Coimbatore, IN

Abstract

Adhoc networks uses mobile nodes to communicate among itself in which it does not have any fixed infrastructure like access point or base station. Due to dynamic network topology MANET security is a challenging task. Most of the routing protocols in MANET assumes a cooperative environment for communication. But, in the presence of malicious nodes, providing security to MANET is critical issue. Due to the increasing applications of MANET building an effective intrusion detection system are essential. This paper addresses using an intelligent approach for intrusion detection in MANET using cross layer technique. We show an paradigm of SVMs, FDAs and AIS approaches for intrusion detection in terms of classification accuracy.

Keywords

AODV (Adhoc on Demand Distance Vector Routing), Cross Layer Security, Mobile Adhoc Networks, Security.

Full Text

     

G. Usha ¹, S. Kannimuthu ², Karthik ³, Gayathri Devi ⁴

Affiliations
1 Department of Software Engineering, SRM University, Kattankulathur, Kanchipuram – 603203, Tamil Nadu, IN
2 Department of CSE, Karpagam College of Engineering, Coimbatore - 641032, Tamil Nadu, IN
3 Department of IT, Karpagam College of Engineering, Coimbatore – 641032, Tamil Nadu, IN
4 Department of IT, Coimbatore Institute of Engineering and Technology, Coimbatore – 641109, Tamil Nadu, IN

Abstract

Various types of portable devices and military applications uses MANET. MANET is infrastructureless one and the security of such a network is a big issue. The detection of misbehavior and intrusions should be done before the attackers affect the network communication so as to keep MANET secure. In this article, a survey regarding single layer and cross layer security solutions for MANET is presented. This paper analyzes the techniques involved in detecting the attacks in each scheme. In this paper the security solutions using single (network) layer against black hole attack is discussed first. Secondly, a brief discussion of cross layer security of the existing works against security attacks using cross layer are given. Finally, the survey is concluded by highlighting open research issues in the field.

Keywords

AODV, Cross Layer Security, MANET, Packet Delivery Ratio, Single Layer Security.

Full Text