1 23 International Journal of Information Technology An Official Journal of Bharati Vidyapeeth's Institute of Computer Applications and Management ISSN 2511-2104 Int. j. inf. tecnol. DOI 10.1007/s41870-019-00309-7 A novel PDF steganography optimized using segmentation technique Sanjive Tyagi, Rakesh Kumar Dwivedi & Ashendra Kumar Saxena