Abstract

Continuously security becomes more important than ever. The rise of e-mail capabilities has increased the need for caring about security aspects. The protection is traditionally designed according to the worth of obtainable information. Thus, security is by far one of the main components and one of the biggest challenges in e-mail attachments. Using computer simulation a new technique of security is used in e-mail attachment by using chaos. Computer programme is designed to convert the attachment file(s) (Word, Excel, Power point, Images, Pdf, …) to PDF file. By this programme each page of the PDF file is converting to a single image called page-image. A mask-image is generated with the same size of each image using manipulated data extracted from nonlinear dynamical system (chaotic system), which has high sensitivity to initial conditions. Each pixel of the mask-image is added to the analogue pixel of the page-image to produce jamming-image. All jamming-images are then converted to one secret PDF file to send it as e-mail attachment file with a compression ratio of more than 10% in size . In the receiving end after downloading of secret attachment file, a real number of password with 12 digits must be interred correctly in order to open the secret PDF file by the same programme. The mask-image will be generated again for each jamming-image in decoding process. High level of security was achieved by this method. The precision of this method is very high up to 10-12 for each password and it can be used also in many applications in the field of mobile communications

The article was added to IASJ on 2012-05-22

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