- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Graphene-Based Steganographicly Aptasensing System for Information Computing, Encryption and Hiding, Fluorescent Sensing and In Vivo Imaging of Fish Pathogens
摘要： Inspired by information processing and communication of life based on complex molecular interactions, some artificial (bio)chemical systems have been developed for applications in molecular information processing or chemo/biosensing and imaging. However, little attention has been paid to simultaneously and comprehensively utilize the information computing, encoding and molecular recognition capabilities of molecular-level systems (such as DNA-based systems) for multifunctional applications. Herein, a graphene-based steganographicly aptasensing system was constructed for multifunctional application, which relies on specific molecular recognition and information encoding abilities of DNA aptamers (Aeromonas hydrophila and Edwardsiella tarda-binding aptamers as models) and the selective adsorption and fluorescence quenching capacities of graphene oxide (GO). Although graphene-DNA systems have been widely used in biosensors and diagnostics, our proposed graphene-based aptasensing system can not only be utilized for fluorescent sensing and in vivo imaging of fish pathogens (Aeromonas hydrophila and Edwardsiella tarda), but can also function as a molecular-level logic computing system where the combination of matters (specific molecules or materials) as inputs produces the resulting product (matter level) or fluorescence (energy level) changes as two outputs. More importantly and interestingly, our graphene-based steganographicly aptasensing system can also be served as a generally doubly cryptographic and steganographic system for sending different secret messages by using pathogen-binding DNA aptamers as information carriers, GO as a cover, a pair of keys: target pathogen as a public key, the encryption key used to encode or decode a message in DNA as a private key. Our study not only provides a novel nano-biosensing assay for rapid and effective sensing and in vivo imaging fish pathogens, but also demonstrates a prototype of (bio)molecular steganography as an important and interesting extension direction of molecular information technology, which is helpful in probably promoting the development of multifunctional molecular-level devices or machines.
关键词： aptasensing,steganography,graphene oxide,DNA aptamer,encryption,fish pathogens,in vivo imaging,information hiding
更新于2025-11-21 11:24:58
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Lossless Information Hiding in Images || Lossless Information Hiding in JPEG- and JPEG2000-Compressed Images
摘要： This chapter focuses on the lossless information hiding in JPEG and JPEG2000 images. For JPEG images, seven typical methods including two schemes from the authors were introduced. For the first five schemes, we introduced the basic ideas, whereas for the schemes from the authors, we provided a detailed introduced detail with experimental results. In the first method of ours, our high-capacity reversible JPEG-to-JPEG data hiding scheme is introduced. Through lowering certain quantization table entries and lifting corresponding quantized DCT coefficients, space is made for embedding data. Using the proposed embedding strategy, our scheme can achieve high embedding capacity and keep the distortion introduced by embedding very low; meanwhile the original cover JPEG image can be restored after the secret data are extracted. Experiments results demonstrate that the proposed scheme maintains the image quality of a stego JPEG image when the embedding capacity is high. Besides, the file size after embedding with not too huge data is acceptable. Compared with Chang et al.’s method and Xuan et al.’s method, the proposed method is superior in terms of the image quality, hiding capacity, and file size. Our scheme is very practical for image files stored and transmitted in the JPEG format. In the second method of ours, a lossless data hiding scheme with file size preservation is proposed. Through analyzing the code space and the statistics of both used and unused VLCs, we find there is still potential free space in the JPEG bitstream that can be explored to hide data. The best of unused VLCs are made and mapped to the used VLCs in specific mapping manners. The proposed scheme embeds data into the VLC codes and whatever mapped VLCs are present are not changed, therefore the image content after data hiding is exactly the same as the original one. Experimental results demonstrate that the proposed scheme can reach better performance irrespective of whether file size preservation is required or not. For JPEG2000 images, we first introduced two schemes from the literature, and then introduce our scheme. In our scheme, high-frequency subbands of the cover image are divided into blocks. In each block, a new histogram shifting method is applied to the histogram of the block for embedding data. Every coefficient that is associated with the peak point embeds 2 bits of data. In addition, we shift the histogram to the left or right adaptively according to a direction sign. Experimental results show that the proposed scheme has high embedding capacity and good invisibility of hidden data.
关键词： steganography,histogram shifting,data hiding,quantization table,reversible watermarking,JPEG2000,Lossless information hiding,JPEG,VLC mapping,DCT coefficients
更新于2025-09-23 15:23:52
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Information hiding scheme based on optical moiré-pixel matrix
摘要： An information hiding scheme for visual cryptography based on optical moiré-pixel matrix is introduced in this paper. The hiding information is formed by black and white unit square visual moiré-pixels with half of the period of a visual moiré pattern. The moiré-pixels can be accurately determined by designing the parameters in the original gratings. To verify the designed information hiding scheme, we experimentally conduct the sharing gratings to decrypt the information by using ordinary low-cost digital printing. The concealment of the sharing gratings is good to ensure the confidentiality. Both the simulation and experimental results show that the provoked scheme can afford enough security demand, yielding that the moiré-pixel matrix is a flexible platform for cryptographic security.
关键词： information hiding,visual cryptography,moiré pattern
更新于2025-09-23 15:22:29
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[ACM Press the 2nd International Conference - Las Vegas, NV, USA (2018.08.27-2018.08.29)] Proceedings of the 2nd International Conference on Vision, Image and Signal Processing - ICVISP 2018 - Hiding MP3 in Colour Image using Whale Optimization
摘要： Information is the key in today’s world and secure transmission is a must. The cryptography is about making cipher and keys management. They assume cipher can be detected and must be strong enough to decipher, but what if the cipher/information is not visible? The cipher would not be detected. The steganography makes this enable. This paper discusses how to hide an MP3 file in a digital image such that it becomes difficult to conclude about the existence of the hidden audio data. Here we utilize the k-LSB of pixels in an image to embed audio data bits into a selected pixel. The pixels are so chosen that the distortion in the image would be minimized due to embedding. This requires comparing all the possible permutations of pixel values, which may lead to exponential time complexity. For faster computation Whale optimization algorithm was used to find the most optimal solution.
关键词： MP3,Information Hiding,Nature-inspired algorithms,PSNR,Steganography,Whale Optimization
更新于2025-09-23 15:21:01