A Review on Image Steganography using Frequency Domain

In the recent years, the art of information hiding has received much attention as security of information has become a big concern in this internet era. Sensitive information sharing via a common communication channel has become inevitable, therefore, Steganography – the art and science of hiding information has gained much attention. Steganography means to conceal the secret messages within some other ordinary media so that it cannot be observed. The final Stego image & the cover image(initial) should not be distinguishable from naked eye. In images, the most common noise component is the LSB (Least Significant Bit), so any changes to the LSB are imperceptible to naked eye. Image steganography schemes can be classified into two broad categories: spatial-domain based and transform-domain based. Frequency domain steganography is a technique for hiding a large amount of data with a good invisibility, high security and without any loss of secret message.