Difference between Steganography and Cryptography

Steganography is a method in which secret message is converted into fake message. Steganography means cover writing. Steganography is the idea to prevent secret information by creating the suspicion. Steganography is less popular than Cryptography. In steganography, structure of data can not be altered.
The Forms of steganography are:

1. Text
2. Audio
3. Video
4. Images 

Cryptography means Secret writing. In cryptography, Sender does not send message directly to the receiver, before sending information to the receiver information or plain text is converted into cipher text by using some encryption algorithm then send to the receiver and receiver decrypt the cipher text into plain text to read the original information.
It is of two types:

1. Symmetric key cryptography
2. Asymmetric key cryptography 

Now, we shall see the difference between them:

S.NO Steganography Cryptography
1. Steganography means cover writing. Cryptography means Secret writing.
2. Steganography is less popular than Cryptography. While cryptography is more popular than Steganography.
3. Attack’s name in Steganography is Steganalysis. While in cryptography, Attack’s name is Cryptanalysis.
4. In steganography, structure of data can not be altered. While in cryptography, structure of data can be altered.
5. Steganography supports Confidentiality and Authentication security principles. While cryptography supports Confidentiality and Authentication security principles as well as Data integrity and Non-repudiation.
6. Steganography relies on parameter such as Key. While cryptography does not relies on any parameter.

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