文章基本信息

标题：Symmetric Encryption Algorithm in Speech Coding for Defence Communications
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作者：Akella Amarendra Babu ; Ramadevi Yellasiri
期刊名称：Computer Science & Information Technology
电子版ISSN：2231-5403
出版年度：2012
卷号：2
期号：1
页码：369-376
DOI：10.5121/csit.2012.2134
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：In battlefield, messages must be encrypted to provide protection from enemy interception. Several speech coding algorithms have been developed to provide secure communications. FS1015 LPC in 1984, FS1016 CELP in 1991and FS MELP in 1997 became official federal standards. In 2002, the US DoD adopted enhanced MELP (MELPe). Later on in 2007, US Naval Research Laboratories have designed Variable Data Rate (VDR) voice processor. Although certain degree of inherent security is ensured in all the above coding algorithms by way of compression techniques, strength of security in these algorithms is weak as the codecs using the above algorithms are vulnerable to interception. Explicit encryption gadgets need to be provided as accessory to provide strong secure communications. In this paper, we have described an algorithm which provides robust and secure communications. This Robust Secure Coder (RSC) is backward compatible with the existing codec's and operates at marginally higher bit rates when switched to secure mode
关键词：Enhanced MELP; Data Encryption standards (DES); FS1015 LPC; Triple DES; Robust Secure ;Coder (R SC)