A Closer Look At Cryptography Essay

When a message is in its original form it is known as plaintext or cleartext and the process that involves masking the text to hide the content is known as encryption. Once a message is encrypted it is referred to as ciphertext . Cryptography or crypto for short has always served the same purpose of encrypting information for reasons of privacy, deception, or security. Cryptographic methodologies could date back to the ancient Egyptian era where standard hieroglyphs were altered to mask true meaning . It is more likely that the first introduction of crypto followed the invention of writing and evolved in line with forms of communication. The use of crypto has been seen as extremely advantageous in times of war, where communication

If you want to keep information secret, you have two possible strategies: hide the existence of the information, or make the information unintelligible. Cryptography is the art and science of keeping information secure from unintended audiences, of encrypting it. Conversely, cryptanalysis is the art and science of breaking encoded data. The branch of mathematics encompassing both cryptography and cryptanalysis is cryptology.

Cryptography is the art of hiding or securing the important communication from the possible attacks of the outside.

Steganography is art of hiding the secret message within an ordinary message and extraction of its destination. Steganography take cryptography a step farther by hiding an encrypted message so that no one finds the existence of the message. If anyone scans your data will fail to know that it contain encrypted data. Steganography maintain the secure communication between the communicating parties. There are different techniques that are used for hiding the secret data as Steganography, Cryptography and Watermarking. There are various drawbacks of the cryptography that are covered by the Steganography. This paper reviews the Steganography techniques and various matrices for performance analysis of Steganography techniques.

Still, the methods of data encryption and decryption are relatively straightforward, and easily mastered. I have been doing data

Steganography is derived from the greek words stego which is known as cover and grafia which is known as writing which is combinedly known as “covered writing”. It is also defined as the art and science of communication in such a way that it hides the existence of the communication. In contrast to cryptography, steganography hides message inside other harmless message in such a way that the enemy connect detect that there is a hidden message inside the cover message.

Cryptography is definitely become a more mainstream topic today. Almost every device in this world is connected to the internet and sharing information. At the same time of the increasing of number in the device, the number of sensitive data in the information shared between devices, application, and server is also increasing in a larger scale. That information must be protected, so that the sensitive data will remain private.

Encryption is the most effective way to provide the data security. It is a process which converts original information into a difficult-to-interpret form. The original information is known as plain text and the converted information/message is commonly known as cipher text.

Pseudo irregular number generations, symmetric cryptography (stream and piece figures), methods of operation, hash capacities, message and substance confirmation conventions, zero information, traps conveying open key encryption and computerized marks, key appropriation, mystery sharing.

The term cryptography develops from a Greek word which implies hidden or secret writing. Cryptography is art of secret writing. The primary service provided by cryptography is capability to send information between two participants in an effective way that halts others from reading it. This type of cryptography provides other services namely,

Steganography is the act of changing the digital media in a way that only sender and the intended recipient is able to detect the message sent through it.

Two set of text images and one true sample image is taken for cryptography. In this proposed work these three images are encrypted into various shares through MATLAB, so that after compiling specific number of share the original image is visible. After encryption the performance analysis is done with the help of PSNR and MSE values.

Cryptography scrambles a message to conceal its contents; steganography hides the existence of a message. It is not sufficient to simply encrypt the message over network, as attackers would detect, and react to, the presence of enciphered communications. But when information hiding is used, even if an eavesdropper snoops the transmitted object, he cannot suspect the secret information in the communication since it is carried out in a concealed way.

Information security is of prime concern as data is being transmitted digitally. A system must provide the essential security services such as authentication, data integrity, data confidentiality, non-repudiation, access control, availability [1]. Cryptography is the study of techniques that provide a means for secure communication. It enables the transmission of the information over insecure channels. It ensures that the data is being accessed or is understood by the authorized persons only. Encryption algorithms are one such mechanism that provide the data security. They are used to encode the plain text into a cipher text which is not in a readable format. The initial input data is known as the plain text. The scrambling of the data in the plain text using various substitution and permutation mechanisms is encryption. The scramble data obtained is not readable and is the cipher text.

Cryptographic strength is measured in the era and resources it ought to demand to recoup the plaintext. The consequence of forceful cryptography is cipher text that is tremendously tough to decipher lacking ownership of the appropriate decoding tool. How difficult? Given all of today’s computing manipulation and obtainable time—even a billion computers replacing