In digital speech security system (DSSS), the analog signal is converted into pulse code modulated (PCM) digital form using an analog-to-digital converter and encrypted before transmission by a special technique. The desired party can decipher the message by treating the received encrypted data with the same technique. Thus conversation can be carried out without interception. The digital signal is combined directly with the output from a pseudorandom number generator (noise generator) to obtain an encrypted speech before transmission. Such a system has the property that for the interceptor, the received message appears like noise and thus prevents him from eavesdropping. However, the desired party can decipher the message by once again mixing the received enciphered message with the local replica of the pseudorandom noise (PN) available with him.
Cite as: Reddy, K.T.V., Prasad, V., Padmakar, N. (2003) Design and implementation of digital speechsecurity system. Proc. Workshop on Spoken Language Processing, 185-190
@inproceedings{reddy03_wslp,
author={K. T. V. Reddy and V. Prasad and N. Padmakar},
title={{Design and implementation of digital speechsecurity system}},
year=2003,
booktitle={Proc. Workshop on Spoken Language Processing},
pages={185--190}
}