Results 111 to 120 of about 1,535 (206)

AUDIO CRYPTANALYSIS- AN APPLICATION OF SYMMETRIC KEY CRYPTOGRAPHY AND AUDIO STEGANOGRAPHY

ICTACT Journal on Communication Technology, 2016
In the recent trend of network and technology, “Cryptography” and “Steganography” have emerged out as the essential elements of providing network security. Although Cryptography plays a major role in the fabrication and modification of the secret message
Smita Paira, Sourabh Chandra
doaj  

Lossless Recovery Scheme for Grayscale Visual Cryptography Based on Random Grids

Journal of Information Systems Engineering and Management
With the advancement of digitalization, the demand for grayscale image encryption has been increasing. Previous visual cryptography schemes for grayscale images have encountered issues such as information loss during recovery, poor recovery quality, and significant pixel expansion. This study introduces novel grayscale visual cryptography schemes based
openaire   +1 more source

Passive lossless turn-on snubbers energy recovery in high frequency power converters

, 1993
This paper describes three passive lossless circuits for recovering turn-on snubber energy, which are applicable to high frequency power converters. The inductive trapped energy, which is load current dependent, is recovered into the DC supply, load or ...
Green, T. C., Williams, B. W., He, X., Finney, S. J.   +3 more
core  

Selective lossless retention of critical thermal data within highly compressed thermal video sequences

The research described in this thesis involves the development of a video coding scheme which provides lossless Region Of Interest (ROl) coding specifically targeted toward the compression of thermal video sequences.
Hall, Geoffrey
core  

A New Family of Soft Single Switched DC-DC Converters with Lossless Passive Snubber

Majlesi Journal of Electrical Engineering
In this paper, a novel lossless snubber is introduced that provides ZVS conditions for both On and Off instant of converter switches. On one hand, the energy of the snubber is optimally transmitted to the output so that no significant losses are imposed ...
Shabnam Nasr Esfahani, Majid Delshad, Mohhamad Tavakoli   +2 more
doaj  

Secure near-lossless medical image compression and encryption with image-specific post-quantum key management and blockchain-based verification. [PDF]

PLoS One
Yadav B, Arakeri M.
europepmc   +1 more source

A Lossless Watermarking Based Authentication System For Medical Images

, 2008
— In this paper we investigate the watermarking authentication when applied to medical imagery field. We first give an overview of watermarking technology by paying attention to fragile watermarking since it is the usual scheme for authentication.
Mohamed Benmohamed, Samia Boucherkha
core  

Application of Information Theory to Computer Vision and Image Processing II. [PDF]

Entropy (Basel)
Flores-Fuentes W, Sergiyenko O, Rodríguez-Quiñonez JC, Miranda-Vega JE.   +3 more
europepmc   +1 more source

Reversible data hiding for electronic patient information security for telemedicine applications. [PDF]

Sci Rep
Muhudin A, Hussein OD, Osoble AM, Mondal J.   +3 more
europepmc   +1 more source

Instant recovery with write-ahead logging

, 2015
Instant recovery improves system availability by reducing the mean time to repair, i.e., the interval during which a database is not available for queries and updates due to recovery activities.
Graefe, Goetz, Sauer, Caetano, Guy, Wey, Härder, Theo   +3 more
core