image encryption in java ppt
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By: Batch-17
Pradeep Surapaneni Raju Kommula.
Under the Guidance of: K V Muthyalu
Chaotic Image Encryption Techniques
A project seminar on
With the Co-ordination of: MD Mir Khasim
Contents
Abstract Introduction Objective Modules Requirements Existing System Proposed System Experimental Analysis Security Analysis Architecture Design Screen Shots Applicability Conclusion
Abstract
In this paper, we will provide an overview of the mechanisms used in image protection, especially Chaos-based encryption techniques available today. We will see how previously proposed methods such as Data Encryption Standard (DES), Triple Data Encryption Standard (Triple-DES), and International Data Encryption Algorithm (IDEA) have been applied in image protection domain and how new concepts of Chaos-based encryption techniques are superior to traditional methods.
The chaotic system is rich in significance and in implication because of sensitivity to change initial conditions, control parameters, ergodicity, random-like behaviour, repeated processing and very high diffusion and confusion properties that are desirable for cryptography.
Introduction
Advances in space science, data analysis, and communication technologies present new opportunities for users
The chaotic system was a new innovation because it can change
To increase productivityReduce costs Facilitate innovation and Create virtual collaborative environments for addressing the new challenges.
Initial conditionsControl parameters Ergodicity, and Very high diffusion and Confusion properties that are desirable for Cryptography.
Objective
The main Objective was to provide a Image encryption mechanism which provides high security level, less computational time and power in reliable and efficient way to deal with balky, difficult and intractable data.
Modules
Administrative o Maintains the user accountability
o Controls the user activities
Encryption Module
o Selects the image o Providing key for Encryption
Decryption Module
o Enter the key for Decryption
File Transfer ModuleWhich transfer file in Networking
Requirements
Hardware Requirements – Processer : Pentium IV 2.0 GHz and above Hard Disk : 10 GB RAM : 256 MB Software Requirements - Operating System : Windows IDE : My Eclipse Frontend : J2EE Coding Language : Java Backend : My SQL Other Technology : Tomcat Server
Existing System
There are traditional image encryption techniques like DES, Triple-DES and IDEA.
Limitations
• requires large data size• long computational time • high computing power.• not suitable for practical image encryption and for online communications
Proposed System
The conventional cryptographic algorithms are mainly based on discrete mathematics.
chaos-based cryptography is relied on the complex dynamics of nonlinear systems .
The image encryption algorithm includes two steps:
Firstly, the image fusion is completed between the original-image and the key-image.
Then the pixel values of the fusion image are encrypted by Henon chaotic system.
Image fusion
Graphics fusion technique can be used in image fusion. According to the image pixel, image fusion can be completed between the same size images. Image fusion is described as following:
E(i, j)=w ×(K(i, j)-O(i, j))+O(i, j)
Where w is parameter, K(i, j) is the pixel values of the key-image ,O(i, j) is the pixel values of the original-image, and E(i, j) is the pixel values of the fusion-image.
Encryption by Henon chaotic Algorithm
In our scheme, Henon chaotic system is adopted to encrypt the fusion-image.
Step1: The Henon chaotic system is converted into one-dimensional chaotic map which is defined as:
Xi+2=1-aX2i+1+bxi
Where a = 0.3 , b [1.07,1.4] .The parameter ∈ a , the parameter b , initial value x0 and initial value x1 may represent the key.
Step2: Set encryption key for the fusion-image, including structural parameters a , b and initial values x0 ,x1 . After image fusion, we adopt Henon chaotic map to change the pixel values of the fusion-image.
Experimental Analysis
Cntd..Experimental Analysis
Security Analysis
A good encryption scheme should be sensitive to the secret keys, and the key space should be large enough to make brute-force attacks infeasible.
In our encryption algorithm, the key-image and the initial values of Henon chaotic map are used as secret keys.
The key space is large enough to resist all kinds of brute-force attacks. The experimental results also demonstrate that our scheme is very sensitive to thesecret key mismatch.
Architecture
Sign in
Add image
Apply choatic algorithm
Network
Receive encrypted
image
Decryption of image
Design Use case diagram
Class diagram
User
username : stringDate : dateFiles : voidtype : stringmessage : string
Createfile()update()delete()save()close()View()
Send Imagemessage : string
name : string
date : dateencryption : void
getaudio()update()delete()save()close()view()
Receive Image
message : string
date : datedecryption : void
getfiles()update()delete()save()close()view()
Keytype : stringfile : voiddate : datetime : timeaudiofile : binarymessage : string
setencryption()setdecryption()getencryption()getdecryption()
create()delete()close()view()
Encryption Decryption
0..1 1..n
1..n
0..1
0..1
1..n
Screen Shots
Home page
Browse Input and Output File
Encryption image
File Transfer
Server Side
Client side file sending process
Receive the file Server
Decrypting image
Finally view of original file
Applicability
This encryption scheme is suitable for applications like
Internet image encryption
secure transmission of confidential information in the Internet.
Conclusion
The proposed algorithm has three merits:
The proposed algorithm has three merits: o The algorithm has a large enough key space to resist all
kinds of brute force attack.o The cipher-image has a good statistical propertyo The encryption algorithm is very sensitive to the secret
keys. o provides high security levelo less computational time o Both reliable and efficient way to deal with balky, difficult and
intractable data
The only disadvantage is that the application should be at both the sender and receiver in network system.
References
Xiao D, Liao X, Wong K, An efficient entire chaosbased scheme for deniable authentication, Chaos, Solitons & Fractals 23(2005):1327–1331.
Tang G, Liao X, Chen Y, A novel method for designing S-boxes based on chaotic maps, Chaos, Solitons & Fractals 23(2005):413–419.
www.ieee.org
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Thanking you all...
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