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Diwakar Dinkar
Diwakar Dinkar

The document discusses combining cryptography and steganography techniques for secure communication. It proposes encrypting a message before hiding it in a digital object like an image file. This provides two layers of security since an extracted hidden message would still be encrypted. The document outlines the cryptography and steganography algorithms to be used, including AES encryption and least significant bit steganography with improvements like randomization and hashing.

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CS 591 C3S C ryptography & S teganography S ecure S ystem By: Osama Khaleel
Quick Intro. ,[object Object],[object Object],[object Object],[object Object]
Motivation: ,[object Object]
Project Idea ,[object Object],[object Object]
Why to do so? ,[object Object],[object Object],[object Object]
Cryptography: T he science of using mathematics to encrypt and decrypt data. It enables you to send sensitive information across insecure networks (such as the Internet). ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Algorithm Steps: ,[object Object],[object Object],[object Object],[object Object]
Steganography: Hiding a secret message within a larger object in such a way that others can not discern the presence of the hidden message. ,[object Object],[object Object],[object Object],[object Object]
The used Steganographic Techniques: ,[object Object],[object Object],[object Object],[object Object]
The improvements on simple LSB: ,[object Object],[object Object]
 
The improvements on simple LSB: ,[object Object],[object Object],[object Object]
The improvements on simple LSB: ,[object Object],[object Object],[object Object]
Now, if you are asking about how the recipient will know what the used variables are; (the random offset, the LSB method, the SHA-hash, the message length, …) : ??? ,[object Object],[object Object]
Program Sequence ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Hiding Revealing
?

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C3 s

  • 1. CS 591 C3S C ryptography & S teganography S ecure S ystem By: Osama Khaleel
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