Survey of steganographic techniques for compressed media

Steganography is the old craft of concealing messages. The word steganography originates from Greek inception and signifies "secured or shrouded expressing" in which hiding information is implanted into a blameless looking transporter. The transporter might be a content record, advanced picture, sound document or a video document. After installed information is exchanged crosswise over correspondence diverts or posted openly territories. In this way, the transporter ought to appear to be blameless under generally examinations. There are a few systems of steganography; some utilization the minimum critical bits of the picture information to conceal the hiding message, some shroud the data in a particular band of the spatial recurrence segment of the transporter, some of them make utilization of the testing mistake in picture digitization. Every one of these procedures are constrained as far as data concealing ability To build the inserting limit we need a steganography system in view of the compressed lossless steganography. In this paper we survey various techniques in which information hidden using compression over the cover picture.