Một thuật toán mã hóa hình ảnh đôi có ý nghĩa hiệu quả dựa trên cảm biến nén song song và nhúng FRFT

Multimedia Tools and Applications - Tập 82 - Trang 27337-27363 - 2023
Donghua Jiang1, Lidong Liu1,2, Liya Zhu3, Xingyuan Wang4, Yingpin Chen5, Xianwei Rong6
1School of Computer Science and Engineering, Sun Yat-sen University, Guangzhou, China
2School of Information Engineering, Chang’an University, Xi’an, China
3School of Electrical and Control Engineering, Chang’an University, Xi’an, China
4School of Information Science and Technology, Dalian Maritime University, Da’lian, China
5School of Physics and Information Engineering, Minnan Normal University, Zhang’zhou, China
6Physics and Electronic Engineering School, Harbin Normal University, Harbin, China

Tóm tắt

Việc truyền tải hình ảnh qua Internet đã tăng mạnh trong vài thập kỷ qua. Tuy nhiên, Internet được coi là một phương thức truyền tải thông tin không an toàn có thể gây ra các vấn đề nghiêm trọng về quyền riêng tư. Để khắc phục những vấn đề bảo mật tiềm tàng đó, trong bài báo này, một thuật toán mã hóa hình ảnh đôi có ý nghĩa mới (VMDIE) kết hợp mạng nơ-ron tế bào lượng tử (QCNN), cảm biến nén (CS) và biến đổi Fourier phân đoạn (FRFT) được đề xuất. Đầu tiên, các hệ số wavelet của hai hình ảnh gốc được tráo đổi bằng thuật toán rối Fisher-Yates và nén bằng ma trận Hadamard một phần được kiểm soát bằng khóa. Hình ảnh mã hóa có ý nghĩa cuối cùng được tạo ra bằng cách nhúng các hình ảnh đã mã hóa vào một hình ảnh chủ cùng tỷ lệ thông qua phương pháp nhúng dựa trên FRFT. Bên cạnh đó, các trị riêng của hình ảnh gốc được sử dụng để tạo ra các luồng khóa bí mật nhằm nâng cao khả năng của thuật toán VMDIE đề xuất chống lại nhiều cuộc tấn công văn bản khác nhau. Sau đó, các trị riêng văn bản được ẩn vào kênh alpha của hình ảnh mã hóa có ý nghĩa dưới sự kiểm soát của các khóa nhằm giảm bớt không gian lưu trữ không cần thiết và chi phí truyền tải. Cuối cùng, kết quả mô phỏng và phân tích bảo mật cho thấy thuật toán VMDIE đề xuất là hiệu quả và có khả năng chịu đựng nhiều cuộc tấn công.

Từ khóa

#mã hóa hình ảnh #mạng nơ-ron tế bào lượng tử #cảm biến nén #biến đổi Fourier phân đoạn #bảo mật thông tin

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