A novel PDF steganography optimized using segmentation technique
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ORIGINAL RESEARCH
A novel PDF steganography optimized using segmentation technique Sanjive Tyagi1
•
Rakesh Kumar Dwivedi1 • Ashendra Kumar Saxena1
Received: 9 May 2018 / Accepted: 17 April 2019 Bharati Vidyapeeth’s Institute of Computer Applications and Management 2019
Abstract In this paper, three novel schemes have been presented for organizing the secret bits inside betweenwords spaces of cover-text before embedding process starts. The primary scheme conceals one bit within each between-words space; the second conceals a group of bits in the assembly of between-words spaces to control the span of cover-text and third scheme designate a lesser number of bits to higher frequencies letters improving payload with a controlled measure of stego-cover-content. Innovative algorithm for implanting and extricating have been proposed for making an interpretation of secret content into a remarkably secured encoded frame thereby acquire secret bits at that point choose any of three bits arranging plans finally inserted into focused locations of PDF cover-file. The proposed extraction process provides authentication of received stego-cover file such that only desired file is acknowledged for the extraction process otherwise fake file is discarded by a recipient. Experimental result demonstrates that the proposed technique provides productive algorithms in the term of high payload, enhanced security of hidden information and work well against steganalysis attack. Keywords Steganography Portable document format Cryptography Embedding Copyright Watermark
& Sanjive Tyagi [email protected] Rakesh Kumar Dwivedi [email protected] Ashendra Kumar Saxena [email protected] 1
Teerthanker Mahaveer University, Moradabad, India
1 Introduction A portable document format (PDF) [1] was developed as Acrobat products for creating the platform-independent e-document by adobe (adobe systems incorporated). Nowadays PDF document is most popular e-document format for cross-platform documents exchange through the internet, therefore PDF document has tremendous potential as the carrier medium in text steganography. Security plays an important role everywhere in our life to keep the information secured so that any unauthorized could not steal them. For this purpose, various techniques are available to keep them in the lock by password protection, secret key, finger-printing protection etc. But today in this era of digital communication across the world activity like illegal accessing, tempering and breaking the copyright act growing immensely. Therefore, there is a need to protect highly important information by using digital security techniques, which can be achieved by hiding confidential digital information inside another digital file or by changing it into non-understandable form. Thus, steganography and cryptography technologies can play an important role in the digital information security system. Cryptography has its own importance to protect the secret information by making non-understandable howeve
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