In this paper, a novel approach of PDF-based text steganography is presented. A covert communication is achieved by embedding secret information at between-characters positions of words within cover PDF text. A stegoencoding technique is being designed to improve the embedding capacity along with sufficiently reduced overheads of stego-cover PDF file. The proposed method constructs multilevel embedding capacities which can be used according to requirements from higher embedding capacity to typical embedding capacity. Encoding and decoding of secret text is being obtained by implementing quadratic probing of hashing technique that builds up a direct encoding table which provides better performance in term of time complexity. Exploratory outcome exhibits that the proposed technique gives productive algorithms in term upgraded security and high payload of concealed data. Experiential verification and examination of the proposed technique with certain prominent text steganographic techniques demonstrate that proposed technique performs better than current methodologies and free of requirements like shading scheme, languages, wordlist, compression and so forth.

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In the present days, smart card payment systems for ecommerce are being used much more extensively than in the past. With the growing use of electronic payment, danger of efraud is also increasing. So effective smart card system requires majors factors like: efficient-remote-based authentication, confidentiality, integrity, reliability etc. We propose a scheme, how smart card with additional fingerprint verification, have the prospective to provide strong payment authorization and thus put a significant solution into the troubles of e-payments fraud. The combination fingerprint identity and password protection using highly secure encryption using Triple-EHDES algorithm would be a key to improving security and reducing e-payment fraud. In this current paper, we introduce an efficient scheme to prevent smart card fraud by the combination of biometric approach and cryptographic scheme-EHDES (Enhanced Data Encryption Standard). Biometric approach enhances safety of smart-card from stolen and EHDES enhance the security of password.

Today's era of communication is too much important. An effective communication requires major factors like: Authentication, Confidentiality, Integrity, etc. In this current paper, we introduce a complete security that provides by the combination of stegnographic approach and cryptographic scheme-EHDES (Enhanced Data Encryption Standard). Stagnographic approach facilitates data hiding and EHDES encrypts the data to be transmitted. A lossless compression provides us integrity. Fuzzy error correction provides error less message over noisy channel.