An efficient algorithm of steganography using JPEG colored image

In Steganography there are many techniques which are used to hide the data in different formats. Most general one is the least significant bit (LSB) substitution method, which is commonly used due to its simplicity. It provides protection to data by hiding it in digital image. But simple use of this approach is more vulnerable to attack. In this paper we have discussed the art and science of Steganography in general and proposed an algorithm which is the variant of LSB substitution method. It efficiently and effectively hides data with the help of a key in JPEG colored digital image. Security of hidden data is proportional to the length of key used. Proposed algorithm is capable to hide more data in cover image and require no preprocessing. Results show that there is less detectable distortion in the stego image and opens the track for proposed algorithm to be used in data hiding and secure transmission.