Journal of information and communication convergence engineering

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Development of a Cryptographic Dongle for Secure Voice Encryption over GSM Voice Channel

  • Kim, Tae-Yong (Div. of Computer and Information Engineering, Dongseo University) ;
  • Jang, Won-Tae (School of Computer and Information Engineering at Dongseo University) ;
  • Lee, Hoon-Jae (School of Computer and Information Engineering at Dongseo University)
  • Published : 2009.12.31
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Abstract

A cryptographic dongle, which is capable of transmitting encrypted voice signals over the CDMA/GSM voice channel, was designed and implemented. The dongle used PIC microcontroller for signals processing including analog to digital conversion and digital to analog conversion, encryption and communicating with the smart phone. A smart phone was used to provide power to the dongle as well as passing the encrypted speech to the smart phone which then transmits the signal to the network. A number of tests were conducted to check the efficiency of the dongle, the firmware programming, the encryption algorithms, and the secret key management system, the interface between the smart phone and the dongle and the noise level.

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References

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