The Use Of Discrete Cosine Transformation(DCT) In Information HidingProcess
journal of kerbala university,
2012, Volume 8, Issue 0, Pages 45-51
AbstractIn the current internet community, secure data transfer is limited due to its attack made on data communication. So more robust methods are chosen so that they ensure secured data transfer. One of the solutions which came to the rescue is the audio hiding to ensure secure data transfer between the source and destination.
The basic idea behind this research is to provide a good, efficient method for hiding the data from hackers and sent to the destination in a safer manner. Though it is well modulated software it has been limited to certain restrictions. The quality of sound depends on the size of the audio which the user selects and length of the message. Though it shows bit level deviations in the frequency chart, as a whole the change in the audio cannot be determined.
Frequency Transformation is a mathematical equation that mapping the image data from the spatial domain to the frequency (spectral) domain , where all the pixels in the input domain contribute to each value in the output domain with one – to – one correspondence between the pixels. Information hiding involves transmitting secret messages through seemingly innocuous files. The goal is that not only does the message remain hidden, but also that a hidden message was even sent .Discreet cosine transformation (DCT) is used as one of frequency transformation type and use it to hide the secrete manage (Audio) inside the carrier (image) , after converting the Audio into a stream of bits . these bits will be embedded inside the image using one of information hiding algorithms and use DCT as one of frequency transformation .
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