Abstract

There are several different encryption standards along with different mechanism are used for text data security. In this paper an efficient text data encryption technique has been proposed based on RC4. In this approach the text is divided into different blocks according to the block division mechanism. The block division is based on the number of bytes. Then the divided block is encrypted with RC4 and then each block is converted into an image and sends to the receiver. The receiver received the images and applied different keys. The numbers of keys are depending on the block. If the block is five then the receiver will apply the five keys for the data decrypted and then join the images by the join key. The results are compared by the histogram, key size, number of blocks, key length and number of keys. The results of our approach are efficient in terms of enhancing security by block division, number of keys and key size.

Keyword

RC4, Block division, Histogram, Number of keys, Key size.

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