Ok Let us understand What is Cryptography and Steganography ?
Cryptography (or cryptology means "hidden, secret writing and study) is the practice and study of techniques for secure communication in the presence of third parties (called adversaries).More generally, it is about constructing and analyzing protocols that overcome the influence of adversaries and which are related to various aspects in information security such as data confidentiality, data integrity, and authentication.Modern cryptography intersects the disciplines of mathematics, computer science, and electrical engineering. Applications of cryptography include ATM cards, computer passwords, and electronic commerce.
Modern cryptography
  • 1 Symmetric-key cryptography

  • 2 Public-key cryptography

  • 3 Cryptanalysis

  • 4 Cryptographic primitives

  • 5 Cryptosystems

  • Steganography:Terrorist Chatting

    Steganography is the art and science of writing hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message, a form of security through obscurity. The word steganography means "concealed writing" . The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography disguised as a book on magic. Generally, messages will appear to be something else: images, articles, shopping lists, or some other covertext and, classically, the hidden message may be in invisible ink between the visible lines of a private letter.

    The advantage of steganography, over cryptography alone, is that messages do not attract attention to themselves. Plainly visible encrypted messages—no matter how unbreakable will arouse suspicion, and may in themselves be incriminating in countries where encryption is illegal.Therefore, whereas cryptography protects the contents of a message, steganography can be said to protect both messages and communicating parties.

    Different Techniques Used In Steganography
    1 Physical
    2 Digital
    3 Network
    4 Printed
    5 Audio
    6 Text
    7 Using Sudoku puzzles

    Some Best tools

    Hiding Secret Messages in Audio Files

    Mp3stegz is an application that apply steganographic (steganography) algorithm in mp3 files. Mp3stegz will maintain original mp3 files size and sound quality. The hidden message is compressed and encrypted.

    Download Here

    Hide MS Excel inside MS Word document (Document Steganography)
    Merge Streams shows you how to merge MS Word streams and MS Excel Workbook stream. It can hide MS Excel document inside MS Word document or vice a versa. If you wish to transparently hide some important documents inside old financial reports this is for you. It does not implement any crypto and is not secured enough, but is a smart trick.

    How to Hide
    Download MergeStream
    Step1: Open Merge Stream Software

    Step2: Browse the MS office File

    Step3: Select the Excel which you want to hide inside MS Word

    Step4: Click on Merge

    Now, your file is been hidden and process completed.

    How to Unhide

    Right Click on Saved MS Office Document and on the option open with and then choose MS office Excel.

    Now Your MS word Doc will automatically convert in MS Excel

    Hide your Video or Audio File Behind Image

    OmhiHide PRO is a powerful data-hiding utility that allows you to hide files within other files. The output files can be used or shared like a normal file would be without anyone ever knowing of the file hidden within it. That way, your data totally stays safe from prying eyes you want to hide it from.

    Download Omhide Pro Here
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