Watermarking of JPEG2000 Compressed Images with Improved Encryption

Abstract

Abstract:The need for copyright protection, ownership verification, and other issues for digital data are getting more and more interest nowadays. Among the solutions for these issues, digital watermarking techniques are used. A range of watermarking methods has been projected. Compression plays a foremost role in the design of watermarking algorithms. For a digital watermarking method to be effective, it is vital that an embedded watermark should be robust against compression. JPEG2000 is a new standard for ima ge compression and transmission. JPEG2000 offers both lossy and lossless compression. The projected approach is used to execute a robust watermarking algorithm to watermark JPEG2000 compressed and encrypted images. For encryption it uses RC6 block cipher. The method embeds watermark in the compressed-encrypted domain and extraction is done in the decrypted domain. The proposal also preserves the confidentiality of substance as the embedding is done on encrypted data. On the whole 3 watermarking schemes are used: Spread Spectrum, Scalar Costa Scheme Quantization Index Modulation, and Rational Dither Modulation.

Novel Scheme for Compressed Image Authentication Using LSB Watermarking and EMRC6 Encryption

“…With less than 18 rounds RC5-64 algorithm (64-bit blocks) is prone to differential attack, when the chosen plain text is 2 44 [17]. RC6 is being used instead of RC5 due to its increased use of registers which was proposed by Kukoo Anna Mathew [18].…”