Halftone visual cryptography

Zhi, Zhou; Arce, Gonzalo R.; Crescenzo, Giovanni Di

doi:10.1109/icip.2003.1247013

Cited by 81 publications

(106 citation statements)

References 4 publications

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“…Zhou and et al [10] explained Halftone visual cryptography and says that some of disadvantage in basic visual cryptography. The some important things are: The position of secret information pixel.…”

Section: Literature Reviewmentioning

confidence: 99%

A Survey of Visual Cryptographic Method for Secure Data Transmission

Devakumari¹,

Geetha²

2017

International Journal of Advanced Research in Computer and Comm

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Transmission of data between the users in the network is an important aspect of today, user of the network wants to share their information between other users of secured data transmission. They were many mode of transaction o data were done, but secured level of data transaction is an important aspect what everyone wants. Secret data transmission is still major problem in network. Embedding the secret information is an upgrading technology for sharing secret data, embedding process cryptography method plays a key role. Effective embedding of secret data by using visual cryptography helps a lot for secret data transmission. This paper provides the survey of various cryptographic methods and its effectiveness for secure transmission over network.

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Section: Literature Reviewmentioning

confidence: 99%

A Survey of Visual Cryptographic Method for Secure Data Transmission

Devakumari¹,

Geetha²

2017

International Journal of Advanced Research in Computer and Comm

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“…The existing algorithm called Otsu algorithm [1] have an advantage of increased bit error rate while has a disadvantage on Image sharing capability. This was rectified to an extent by working with an algorithm based on Halftoning technique [10] . Visual Cryptography schemes are secret sharing schemes where the image is diffused into n number of transparencies.…”

Section: IImentioning

confidence: 99%

Visual Cryptography for Light Encryption Scheme Using LED Based On Halftoning Algorithm

Gokul¹

2017

IJRASET

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Abstract-Visible Light is regarded as a reliable mode of communication in comparison with Radio Frequency communication. It has a great scope in 5G networks. But this visible light communication is prone to security issues like eavesdropping due to its visual nature. This paper deals with the light encryption scheme using Light Emitting Diode. Keywords: Security, Visual Cryptography, Otsu, Halftone, Lifi I.INTRODUCTION As the technology rules the world currently, security plays a very vital role in data transfer. This can be provided by means of Network security. Cryptography is a study of mathematical technique that relates the aspects of security issues like Data confidentiality, Data Integrity and Data Availability which is referred to as CIA triangle. Visual Cryptography is a new technique of providing information security using simple user algorithms. Complex, computationally intensive algorithm is not used in this technique as used in the traditional cryptographic techniques. As images are more attractive than text, they are more prone to hacking nowadays. The security should be provided for Visible Light Communication of image transmission. As far as now the security for image transmission in VLC was provided by an Otsu algorithm which has enhanced Bit Error Rate but has a limitation on computational time and image sharing scheme. This can be overcome by an Image security algorithm called halftone algorithm. The proposed idea will overcome the limitations that were mentioned above. Figure1 represents the light encryption system using laptops. The VLC signal from a LED can be received by a light encrypting device like mobile or laptops, which could be any device that has a optical receiver such as photodiode or an camera image sensor, and also having a visible LED for optical transmitter. After the visible light signal from LED is received by the light encrypted device, the image data can be encrypted by applying halftone algorithm followed by an XOR cipher. This ensures double encrypted security for the data to be sent. The above implementation could be made possible for the future VLC medium.

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“…In 2006 the Zhi Zhou, Gonzalo, R.Arce and Giovanni Dicrescenzo [29][30][31][32][33] have proposed halftone visual cryptography which produce good quality and meaningful halftone shares, the generated halftone shares contain the visual information. In halftone visual cryptography a secret binary pixel "P" is encoded into an array of Q1 x Q2 ("m" in basic model) sub pixels, referred to as halftone cell in each of the "n" shares.…”

Section: Related Workmentioning

confidence: 99%

Error Filtering Schemes for Color Images in Visual Cryptography

F.R¹,

M.K²

2011

IJACSA

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-The color visual cryptography methods are free from the limitations of randomness on color images. The two basic ideas used are error diffusion and pixel synchronization. Error diffusion is a simple method, in which the quantization error at each pixel level is filtered and fed as the input to the next pixel. In this way low frequency that is obtained between the input and output image is minimized which in turn give quality images. Degradation of colors are avoided with the help of pixel synchronization. The proposal of this work presents an efficient color image visual cryptic filtering scheme to improve the image quality on restored original image from visual cryptic shares. The proposed color image visual cryptic filtering scheme presents a deblurring effect on the non-uniform distribution of visual cryptic share pixels. After eliminating blurring effects on the pixels, Fourier transformation is applied to normalize the unevenly transformed share pixels on the original restored image. This in turn improves the quality of restored visual cryptographic image to its optimality. In addition the overlapping portions of the two or multiple visual cryptic shares are filtered out with homogeneity of pixel texture property on the restored original image. Experimentation are conducted with standard synthetic and real data set images, which shows better performance of proposed color image visual cryptic filtering scheme measured in terms of PSNR value (improved to 3 times) and share pixel error rate (reduced to nearly 11%) with existing grey visual cryptic filters. The results showed that the noise effects such as blurring on the restoration of original image are removed completely.

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Halftone visual cryptography

Cited by 81 publications

References 4 publications

A Survey of Visual Cryptographic Method for Secure Data Transmission

A Survey of Visual Cryptographic Method for Secure Data Transmission

Visual Cryptography for Light Encryption Scheme Using LED Based On Halftoning Algorithm

Error Filtering Schemes for Color Images in Visual Cryptography

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