PERFORMANCE EVALUVATION OF CHAOTIC ENCRYPTION

GUIDE: PROF JOHN SINGHSITE

ANCY MARIAM BABU10MCA0010

OBJECTIVES

The main objectives are: To analyze the confidentiality, integrity of the

transmitting video data To analyze the efficiency of each chaotic algorithm To observe the encryption speed , power consumption

and CPU utilization of the system.

INTRODUCTION

What is cryptography? The objectives of cryptography What is chaos? Chaotic cryptography

Chaotic encryption Chaotic decryption

CRYPTOGRAPHY

Cryptography is science of secure information.

Components: Encryption Decryption

Objectives: Confidentiality Authentication Integrity

CHAOS

The term ‘CHAOS’ defined: the state of randomness or confusion.

Chaos theory A field of study in mathematics Study the behavior of dynamic systems

with initial condition

CHAOTIC CRYPTIGRAPHY-HISTORY

IN 1950, SHANNON MENTIONED CHAOS CAN USEDD FOR CRYPTOGRAPHY

AT 1980, SHANNON DEVELOPED CHAOTIC THEORY

1N 1990, FIRST CHAOTIC BASED CIPHER 1N 1998, CHAOTIC ENCRYPTON

DEVELOPED BY BAPTISTA IN 2000, CHAOS STARTED TO USE

WIDELY

CHAOTIC CRYPTOGRAPHY

Type of fast and secure cryptographic method Usually chaotic signals are noisy like and

chaotic systems are initially sensitive. Substantial reduction in encryption and

decryption time. Components

Chaotic encryption and decryption

CHAOTIC ENCRYPTION

Known as Baptista's method . Encryption process

Define mapping scheme of trajectory Choose initial condition and parameter key Set initial condition as current trajectory Iterate the chaotic equation until the trajectory

reaches the destination site for each symbol. Store the number of iterations as a cipher Encrypt the next message with current

trajectory Produce cipher and repeat the process

CHAOTIC DECRYPTION

Decryption process Set the initial condition and parameters and apply the

same mapping scheme for decryption. Iterate the chaotic equation by the cipher (number of

iterations). Find out the site that the trajectory belonged to and

store the symbol of the site as message symbol. Decrypts next symbol by iterating the current trajectory

and producing the next message symbol and so on.

EXISTING METHODS

Selected algorithms are CVES SEA NCA EES

ALGORITHMS

CVEA Proposed by Shu Jun Lia, Xuan Zhengb, Xuanqin Moua and

Yuanlong Caia Universal hasty encryption scheme Method: encrypt the video using plain cluster The encryption procedure: one plain-cluster is encrypted by

stream sub cipher and followed by block sub cipher. Decryption: the encrypted plain-cluster is firstly decrypted

by block sub-cipher Pre decrypted plain cluster is encrypted by stream sub

cipher.

ALGORITHMS

SEA Low cast targeted encryption Operates on several word sizes, texts and key Based on Feistel theory with random round of

varying numbers.

NCA Use power function and the tangent function Proposed by Hogan Gao, Yisheng Zhang, Shuyun

Liang, Dequn Li. Two parts of analysis:

Logistic map analysis NCA map design

ALGORITHM

EES Approved by U.S department of commerce in

1994. Considerable feature is a key escrowed method

enabling for detecting attacker Symmetric key encryption method Both SKIPJACK and LEAF creation methods are

used for the encryption or decryption.

RESULTS AND DISCUSSION

Performance analysis of selected chaotic encryption technique

Parameters used: Encryption speed CPU utilization Power consumption

Tool used: CPU meter Encryption –decryption tools Laptop with IV CPU 2.4GHz

PARAMETERS

ENCRYPTION SPEED: Throughput of the encryption indicate speed of

encryption.

CPU utilization: CPU utilization means the CPU processing time. It indicates the load on the CPU

Power consumption: CPU cycle measurement. Depends on the load on CPU

ENCRYPTION SPEED

THROUGHPUT

0

5

10

15

20

25

30

35

40

45

comparison of different encryp-tion in terms of encryption time and packet size:

CVES

SEA

NCA

EES

POWER CONSUMPTION

49 100 247 694 963 3341.19 5310.880

200

400

600

800

1000

1200

1400

1600

1800

2000

comparison of different encryption in terms of encryption time and packet size:CVESSEANCAEES

TOOLS

CPU meter Encryption decryption tool

Snapshots of encryption

USING CERTAIN TOOLS FOR ENCRYPTION

SNAPSHOTS FOR ENCRYPTED DATA

CONCLUSION

Chaotic cryptography provides higher security and efficiency to resist the attack.

CVES and NCA – better encryption speed EES needs more time to encrypt All the algorithm ranges security from high to

middle level.

REFFEERENCE

Gary C. Kessler 1998, An overview of cryptography, Auerbach (September 1998) pp 3-4.

Jon Collas 2009, introduction to cryptography, pgp cooperation pp7-29

Deckert Florian , 23 march 2007, A brief history of cryptography, slide share.net 1 April 2010

J Wei, X Liao, K Wong, T Xiang 2006, A new chaotic cryptosystem, chaos Solutions & Fractals – Elsevier pp 4-10

M.K.HO (Archon) 2001 chaotic encryption standard-history, chaotic encryption webmaster

Stephen R. Addison, John E. Gray 2006 Chaos and encryption: problems and potential , IEEE 2006 , pp 275

 

REFFERENCE

T Yang 2004, A Survey of chaotic secure communication system , international journal of computational cognitive, yangsky.com

Shujun Li, Xuan Zheng, Xuanqin Mou and Yuanlong Cai February 2002, chaotic encryption scheme for real time digital video, electronic imaging 2002, vol: 4666, pp149-160

Yaobin Mao and Guanrong Chen, chaos based image encryption, 725 publications/journal pp8-20

G. Alvartz and Shujun Li, 2009, Crypt analyzing a nonlinear chaotic algorithm(NCA) for image encryption, communication in nonlinear science and numerical simulations vol:14 pp 3743-3759