Secure Mail using Visual Cryptography (SMVC)

Abstract

The E-mail messaging is one of the most popular uses of the Internet and the multiple Internet users can exchange messages within short span of time. Although the security of the E-mail messages is an important issue, no such security is supported by the Internet standards. One well known scheme, called PGP (Pretty Good Privacy) is used for personal security of E-mail messages. There is an attack on CFB Mode Encryption as used by OpenPGP. To overcome the attacks and to improve the security a new model is proposed which is "Secure Mail using Visual Cryptography". In the secure mail using visual cryptography the message to be transmitted is converted into a gray scale image. Then (2, 2) visual cryptographic shares are generated from the gray scale image. The shares are encrypted using A Chaos-Based Image Encryption Algorithm Using Wavelet Transform and authenticated using Public Key based Image Authentication method. One of the shares is send to a server and the second share is send to the receipent's mail box. The two shares are transmitted through two different transmission medium so man in the middle attack is not possible. If an adversary has only one out of the two shares, then he has absolutely no information about the message. At the receiver side the two shares are fetched, decrypted and stacked to generate the grey scale image. From the grey scale image the message is reconstructed.Index Terms-chaos based image encryption algorithm, low frequency wavelet coefficient, visual cryptography, dynamic sbox algorithm, wavelet decomposition, pretty good privacy;

Securing software defined network transactions using visual cryptography in steganography

“…As we know, the email messages are very popular and important uses in the global network. Ajish and Rajasree proposed that it is to apply this algorithm on the mail messages splitting it into two shares then encrypted using the Choas-Based image encryption algorithm using Wavelet transform [7]. Least Significant Bit steganography (LSB) is one of the most popular methods used for hiding messages inside images.…”

A Survey of Email Service; Attacks, Security Methods and Protocols

“…If an attacker has from two shares just one part, so no information can the attacker obtain concerning the message at the recipient side, he can recovery the grey scale image through of fetch the two shares, decrypted and stacked. Finally, the message is restoring from the grey scale image [21].…”