Universal Logic Sequences. - Ed Dawson; Bruce Goldburg (AUSCRYPT, 1990)

Speech encryption using discrete orthogonal transforms. - S. Sridharan; Ed Dawson; Bruce Goldburg (ICASSP, 1990)

A Secure Analog Speech Scrambler Using the Discrete Cosine Transform. - Bruce Goldburg; Ed Dawson; S. Sridharan (ASIACRYPT, 1991)

The Automated Cryptanalysis of Analog Speech Scramblers. - Bruce Goldburg; Ed Dawson; S. Sridharan (EUROCRYPT, 1991)

Design and Cryptanalysis of Transform-Based Analog Speech Scamblers. - Bruce Goldburg; S. Sridharan; Ed Dawson (IEEE J. Sel. Areas Commun., 1993)