Đề xuất một số lược đồ nhúng tin và thủy vân dễ vỡ khóa công khai trên ảnh JPEG

  • Tiêu Thị Ngọc Dung
  • Đỗ Văn Tuấn
  • Phạm Văn Ất


This paper proposes some new schemes for data hiding and watermarking in JPEG images by using quantized discrete Cosine transform (DCT) blocks. The DCT coefficients are segmented into groups of continuous elements. For each group, r bits can be embedded by changing at most one element of the group. In comparison to some widely used data hiding schemes for JPEG images, our data hiding schemes achieve higher capability and better stego-image quality. The proposed public key watermarking method based on an embedded algorithm is capable to authenticate digital images.



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ĐỖ VĂN TUẤN, TRẨN ĐĂNG HIÊN, CAO THỊ LUYÊN VÀ PHẠM VĂN ẤT, “Một thuật toán thủy vân bền vững khóa công khai cho ảnh màu dựa trên sự hoán vị ngẫu nhiên trong các tập con”, Tạp chí CNTT&TT, Tập V-1, Số 9 (29), tháng 6 -2013.

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