Manufacturing cheap, resilient, and stealthy opaque constructs
POPL '98 Proceedings of the 25th ACM SIGPLAN-SIGACT symposium on Principles of programming languages
Information Hiding Techniques for Steganography and Digital Watermarking
Information Hiding Techniques for Steganography and Digital Watermarking
White-Box Cryptography and an AES Implementation
SAC '02 Revised Papers from the 9th Annual International Workshop on Selected Areas in Cryptography
On the (Im)possibility of Obfuscating Programs
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
Perceptrons: An Introduction to Computational Geometry
Perceptrons: An Introduction to Computational Geometry
Proceedings of the 11th ACM workshop on Multimedia and security
Quantitative steganalysis of LSB embedding in JPEG domain
Proceedings of the 12th ACM workshop on Multimedia and security
Quantitative structural steganalysis of Jsteg
IEEE Transactions on Information Forensics and Security
Nonblind and quasiblind natural preserve transform watermarking
EURASIP Journal on Advances in Signal Processing - Special issue on advanced image processing for defense and security applications
Consideration of the watermark inversion attack and its invalidation framework
IWDW'12 Proceedings of the 11th international conference on Digital Forensics and Watermaking
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Watermark detection software is obfuscated using a table to hide embedding and detection algorithms. As the table size is limited, the block size is also limited for watermarking. To address this situation, a new quasi-chirp transform is developed to improve embedding efficiency. The quasi-chirp transform is different from the conventional DCT or Fourier transform. It contains multiple frequency components in a single basis of the transform. It disperses image data rather than compressing it, as the DCT does. The dispersed data increases the range for embedding watermarks. The chirp transform is able to embed even on a flat area of an image. Using this chirp transform, embedding and detection experiments for image data with small block sizes were carried out. A high SNR and robust watermark with an evaluated obfuscation were obtained.