DFD

Steganography Data Flow Diagram – Level 0

Input text, image, audio, video

Hidden Object

Program Logic

Encryption Keys

Output File Input + Hidden

Level 0 DFD

Page 1 of 14 Created by Tilak Raj Chandan

Steganography Data Flow Diagram – Level 1

OK 

Login Form

Select Process

Authentication

Authentication Form

Main Form

Process Execution

Back 

Resources Exit

Level 1 DFD

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Output

Steganography Data Flow Diagram – Level 2

OK 

Login Form

Password

User name & Password

Invalid User name & Password

User name

& Date of Authentication Form

Forgot Password

Back 

User Record

Password Retrieval Process

Incorrect User  name & Date of Birth

(a) Exit Level 2(a) DFD

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birth

Steganography Data Flow Diagram – Level 2 (a) About Us Form

Help Window Help

About us

(c)

Cl C lick  

(b) Register

User

Main

  Encryption

(e)

Interface (d)

Schedular

ZIP

(m)

Color 

Compression (f)

OK

Text

 

Image

Color Chooser  Audio Hide

Video Hide

(g)

(h)

EXIT

(i)

(j) Audio Extract

Video Extract

(k)

(l)

Level 2(b) DFD

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Choose Color 

Steganography Data Flow Diagram – Level 2

(b) Registeration Successful

Register  Interface

Correct Registeration Key

cancel

Incorrect Key

(a)

OK 

Level 2(c) DFD

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Steganography Data Flow Diagram – Level 2

(C) User Account Help Modify User  Settings

Add new User Account

User GUI Interface

OK 

help

Delete Account

(a)

Level 2(d) DFD

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Steganography Data Flow Diagram – Level 2

(d)

Input File

Set Time & Put to Scheduler  Scheduler 

Schedular  Hidden Object

Task Scheduled OK 

OK 

Encryption Key

Schedular Help

(a)

Level 2(e) DFD

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Steganography Data Flow Diagram – Level 2 (e)

(a)

OK 

Crypt Interface

help

Encryption Help

Select

Plain Text

Select Decryption

Encryption

Cipher Text Encryption

Decryption

key

Cipher Text

Plain Text

Level 2(f) DFD

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Steganography Data Flow Diagram

(f)

(a)

OK 

Compression

help

Encryption Help

Interface

Select

Plain Text

Select Decompression

Compression

Cipher Text Compress

Compressed Text

Decompress

Original Text

Level 2(g) DFD

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Steganography Data Flow Diagram – Level 2 (m)

Zip Interface

Add more files

zip

Unzip Select Folder 

save

OK

 

Extract

save zip file

Files Extracted

(a) Level 2(h) DFD

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Steganography Data Flow Diagram – Level 2 (g)

(a)  back 

Carrier File(txt, rtf, htm )

Text GUI Interface hide

help

Output File

Extract

Hidden Message

Extraction Process Hiding Process

Output File

Hidden Message Text Help

Level 2(i) DFD

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Steganography Data Flow Diagram – Level 2 (h)

(a)  back 

Carrier File( bmp,gif )

Image GUI Interface hide

help

Output File

Extract

Hidden Message

Extraction Process Hiding Process

Hidden File

Hidden Message Image Help

Output File

Level 2(j) DFD

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Steganography Data Flow Diagram – Level 2 (i)

(a)  back 

Carrier File(mp3, rm, wav )

Audio GUI Interface hide

help

Output File

Extract

Hidden Object

Extraction Process Hiding Process

Output File

Hidden Message Audio Help

Level 2(k) DFD

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Hidden File

Steganography Data Flow Diagram – Level 2 (j)

(a)  back 

Carrier File(dat,wmv,avi,3gp)

Video GUI Interface hide

help

Output File

Extract

Hidden Object

Extraction Process Hiding Process

Output File

Hidden Message Video Help

Level 2(l) DFD

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Hidden File