Security Assessment of Scalar Costa Scheme Against Known Message Attack in DCT-Domain Image Watermarking

سال انتشار: 1392
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 774

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شناسه ملی سند علمی:

ICEE21_686

تاریخ نمایه سازی: 27 مرداد 1392

چکیده مقاله:

Security level analysis of watermarking techniques against intentional attacks receives more attention recently in watermarking theory. The most popular data hiding code usingin digital watermarking is the scalar costa scheme (SCS). In this paper, SCS is implemented for digital image watermarking inDiscrete Cosine Transform (DCT) domain. Then, Known Message Attack (KMA) is applied on SCS in order to estimate the secret key and evaluate practically the information theoretic security level of SCS. Empirical results show that practical security level of SCS is much lower than former theoreticalresult. Furthermore, it can be seen that the practical security level of SCS depends on the host statistics which hascontradiction with the former theoretical result.

نویسندگان

Reza Samadi

Ferdowsi University of Mashhad