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Secure Text Communication for the Tiger XS
Linköping University, Department of Electrical Engineering.
2006 (English)Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
Abstract [en]

The option of communicating via SMS messages can be considered available in all GSM networks. It therefore constitutes a almost universally available method for mobile communication.

The Tiger XS, a device for secure communication manufactured by Sectra, is equipped with an encrypted text message transmission system. As the text message service of this device is becoming increasingly popular and as options to connect the Tiger XS to computers or to a keyboard are being researched, the text message service is in need of upgrade.

This thesis proposes amendments to the existing protocol structure. It thoroughly examines a number of options for source coding of small text messages and makes recommendations as to implementation of such features. It also suggests security enhancements and introduces a novel form of stegangraphy.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2006. , 135 p.
Keyword [en]
source coding, text compression, cryptography, steganography, PPM
National Category
Other Engineering and Technologies not elsewhere specified
URN: urn:nbn:se:liu:diva-8011ISRN: LITH-ISY-EX--06/3842--SEOAI: diva2:22908
2006-12-08, Algoritmen, B-huset, 10:00
Available from: 2007-01-11 Created: 2007-01-11

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