Recent Audio Steganography Trails and its Quality Measures

The term Steganography refers to the science that deals with hiding the secret messages (text or anything else) inside an original cover file of the text, audio, video or image. The need for modern methods is to keep the secret information and protected it with the increasing danger of outside hackers. Steganography seems to be a good option to increase information security by hiding them. This paper is a review of the past year's methods used in audio steganography. Audio steganography is a method to hide a secret message (sound or anything else) in an audio cover file, in varied ways. It is a proposal for future actions. These methods used different types of digital audio such as WAV, MP3 or AU. The result showed that most of the studies used LSB to embed secret messages, but with other encryption-system for strength LSB family. Others Modified LSB to produce an enhanced method. In general, most studies concentrate on common methods or their combination to develop new efficient methods. Most of the studies had a lack in all or some measures of invisibility and robustness. This concept came after authors' interesting in cryptography more than steganography. This study recommended maintaining all measures to enable future studies to determine which steganography method is most effective.