Abstract:
Steganographic techniques allow one party to
communicate information to another without a third
party knowing that the communication is occuring.
Steganography works by replacing bits of useless or
unused data in regular computer files with bits of
different, invisible information. This paper presents
the performance analysis for two steganographic
algorithms, DWT and 4-LSB algorithm. 4-LSB
algorithm works in spatial domain, where dimension
can be any size. DWT algorithm works in frequency
domain, where there are two dimensions, time and
frequency. This system is implemented to hide image
and text in the container image. According to
experimental results, the similarity of extracted
image and secret image by 4-LSB is higher than
those of DWT but steganography by DWT method
can resist to attacks more than 4-LSB algorithm.
