文章基本信息

标题：Encryption of an Audio File on Lower Frequency Band for Secure Communication
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作者：Sheetal Sharma ; Lucknesh Kumar ; Himanshu Sharma 等
期刊名称：International Journal of Advanced Research In Computer Science and Software Engineering
印刷版ISSN：2277-6451
电子版ISSN：2277-128X
出版年度：2013
卷号：3
期号：7
出版社：S.S. Mishra
摘要：Cryptography is the study of information hiding and verification. It includes the protocols, algorithms and strategies to securely and consistently prevent or delay unauthorized access to sensitive information. It also enables verifiability of every component in a communication. In this paper a frequency domain of the wav audio signal is taken for the encryption and decryption. Here, we use the DFT (Discrete Fourier Transform) for transforming the time domain audio signal to frequency domain audio signal. An audio signal can be separated into different frequency bins with respect to phase and magnitude values by applying DFT on the audio signal. Here, we apply RSA technique for the encryption and decryption on the lower frequency bands because all the frequency regions do not participate equally in the communication. After applying the encryption on different frequency bands, we observe that, the encryption on the lower frequency band is more effective than the higher one. So, we would apply encryption on lower frequencies with higher phase values. Here we are applying our technique on phase values
关键词：Histogram; Wav Signal; DFT; Frequency Domain; Power Spectrum