An Improved Steganographic Scheme Using the Contour Principle to Ensure the Privacy of Medical Data on Digital Images

With the improvement of current online communication schemes,it is now possible to successfully distribute and transport secured digital Content via the communication channel at a faster transmission rate.Traditional steganography and cryptography concepts are used to achieve the goal of concealing secret Content on a media and encrypting it before transmission.Both of the techniques mentioned above aid in the confidentiality of feature content.The proposed approach concerns secret content embodiment in selected pixels on digital image layers such as Red,Green,and Blue.The private Content originated from a medical client and was forwarded to a medical practitioner on the server end through the internet.The K-Means clustering principle uses the contouring approach to frame the pixel clusters on the image layers.The content embodiment procedure is performed on the selected pixel groups of all layers of the image using the Least Significant Bit(LSB)substitution technique to build the secret Content embedded image known as the stego image,which is subsequently transmitted across the internet medium to the server end.The experimental results are computed using the inputs from“Open-Access Medical Image Repositories(aylward.org)”and demonstrate the scheme’s impudence as the Content concealing procedure progresses.

Block-Based Adaptive Image Steganography Using LSB Matching Revisited

Recently, an edge adaptive image stegano- graphic method based on least significant bit （LSB） matching revisited （EA-LSBMR） has been proposed, which holds good visual quality and proper security under appropriate embedding rates. However, from the extensive experiments to EA-LSBMR, we find that the discrete Fourier transform （DFT） spectrum of pixelpairs differences histogram still reveals the presence of a secret message even in a low embedding rate. To enhance the security, a modified scheme is proposed in this paper, which can defeat the above-mentioned analysis and keep the visual quality better than EA-LSBMR in higher embedding rates. Experimental results using a latest universal steganalysis method have demonstrated the proposed method＇s good performance.

Double-Layer Data Embedding Scheme Based on Three-Pixel Differences

Steganography is a technique to hide the secret data into digital media without getting any unexpected notices. The traditional steganographic method, namely least significant bit （LSB） replacement, is a simple but insecure scheme. To overcome the traditional drawbacks, this paper proposes a steganographic scheme, which is called double-layer hiding method. The experimental results confirm that the proposed scheme achieves better biding capacity with high ability of resisting security analysis.

A Novel Approach of Image Steganography for Secure

Steganography aims to hide the messages from unauthorized persons for various purposes,e.g.,military correspondence,financial transaction data.Securing the data during transmission is of utmost importance these days.The confidentiality,integrity,and availability of the data are at risk because of the emerging technologies and complexity in software applications,and therefore,there is a need to secure such systems and data.There are various methodologies to deal with security issues when utilizing an open system like the Internet.This research proposes a new technique in steganography within RGB shading space to achieve enhanced security compared with existing systems.We evaluate our approach with the help of diverse image quality evaluation techniques including MSE(Mean Square Error),RMSE(Root Mean Square Error),PSNR(Peak Signal-to-Noise Ratio),MAE(Mean Absolute Error),NCC(Normalized Cross-Correlation)and SSIM(Structural Similarity Index).Our experimental results demonstrate improved strength,intangibility,and security when contrasted with existing techniques and vindicate the effectiveness of this exploration work.The proposed approach achieved a 3.6701%average higher score for PSNR Correlation than the next best existing approach.Moreover,in PSNR with a variable amount of cipher embedded in the same images of the same dimensions,the proposed approach attained a 5.22%better score.Embedding the same size of cipher in images of different size resulted a 3.56%better score.

Elevating Image Steganography:A Fusion of MSB Matching and LSB Substitution for Enhanced Concealment Capabilities

In today’s rapidly evolving landscape of communication technologies,ensuring the secure delivery of sensitive data has become an essential priority.To overcome these difficulties,different steganography and data encryption methods have been proposed by researchers to secure communications.Most of the proposed steganography techniques achieve higher embedding capacities without compromising visual imperceptibility using LSB substitution.In this work,we have an approach that utilizes a combinationofMost SignificantBit(MSB)matching andLeast Significant Bit(LSB)substitution.The proposed algorithm divides confidential messages into pairs of bits and connects them with the MSBs of individual pixels using pair matching,enabling the storage of 6 bits in one pixel by modifying a maximum of three bits.The proposed technique is evaluated using embedding capacity and Peak Signal-to-Noise Ratio(PSNR)score,we compared our work with the Zakariya scheme the results showed a significant increase in data concealment capacity.The achieved results of ourwork showthat our algorithmdemonstrates an improvement in hiding capacity from11%to 22%for different data samples while maintaining a minimumPeak Signal-to-Noise Ratio(PSNR)of 37 dB.These findings highlight the effectiveness and trustworthiness of the proposed algorithm in securing the communication process and maintaining visual integrity.

A low power mixed signal DC offset calibration circuit for direct conversion receiver applications

A low power mixed signal DC offset calibration （DCOC） circuit for direct conversion receiver applica- tions is designed. The proposed DCOC circuit features low power consumption, fast settling time and a small die area by avoiding the trade-off between loop response time and the high pass frequency of the DCOC servo loop in conventional analog DCOC systems. By applying the proposed DC offset correction circuitry, the output residue DC offset voltages are reduced to less than 38 mV and the DCOC loop settling time is less than 100 μs. The DCOC chip is fabricated in a standard 0.13μm CMOS technology and drains only 196 μA from a 1.2-V power supply with its chip area of only 0.372 ×0.419 mm^2.