Patent
Key synchronization in an image cryptographic systems
Geert J. Schrijen,Pim Tuyls +1 more
TLDR
In this paper, a system for visual cryptography comprises a server (1) for encrypting a series of images using a set of keys, a terminal (2) for displaying the encrypted images, a transmission medium (4) for transmitting the encrypting images from the server to the terminal, and a decryption device (5) for decrypting the encrypted image displayed on the terminal.Abstract:
A system for visual cryptography comprises a server (1) for encrypting a series of images using a set of keys, a terminal (2) for displaying the encrypted images, a transmission medium (4) for transmitting the encrypting images from the server to the terminal (2), and a decryption device (3) for decrypting the encrypted image displayed on the terminal. Subsequent images are encrypted using different keys chosen from the set of keys. These encrypted images and a feedback mechanism are provided to test whether the server and the terminal utilize the same keys at a particular instant. Preferably at least two encrypted images are provided simultaneously as parts of a larger image, thus allowing a user of the decryption device to indicate which key decrypts the image correctly.read more
Citations
More filters
Patent
Cryptographically strong key derivation using password, audio-visual and mental means
TL;DR: In this paper, the authors propose a security system that uses a cryptographic key derived from human interaction with media, such as graphical media and audio data, among other parameters such as password, salt, and iteration count.
Patent
Method and system for transmitting data from a first data processing device to a second data processing device
TL;DR: In this article, the authors proposed a method and a system for transmitting data from a first data processing device (2) to a second data processing devices (1), where the first device has a display device and the second device has an optical filter containing a decryption pattern.
Patent
Preserving image privacy when manipulated by cloud services
TL;DR: In this article, an apparatus and method for preserving image privacy when manipulated by cloud services includes middleware for receiving an original image, splitting the original image into two subimages, where the RGB pixel values of the sub-images have a bit value that is less than RGB pixel value of the original images.
Patent
Key synchronization in a visual cryptographic system
Pim Tuyls,Marten van Dijk +1 more
TL;DR: In this article, a system for visual cryptography comprises a server (1) for encrypting a series of images using a set of keys, a terminal (2) for displaying the encrypted images, a transmission medium (4) for transmitting the encrypting images from the server to the terminal, and a decryption device (3) for decrypting the encrypted image displayed on the terminal.
Patent
Image decryption apparatus
TL;DR: In this article, a display processor displays on a display screen an encrypted image accepted by an image data acceptor, and the decryption process on the encrypted image in the decrypted target regions in accordance with a decryption order is performed.
References
More filters
Visual Cryptography
Moni Naor,Adi Shamir +1 more
TL;DR: In this paper, a new type of cryptographic scheme, which can decode concealed images without any cryptographic computations, is proposed, which is called k-out-of-n secret sharing.
Patent
Visually interactive encoding and decoding of dataforms
TL;DR: In this paper, the authors present a system for interactive encoding and decoding of machine-readable dataforms, which provides more efficient encoding avoiding trial-and-error dataform production and more accurate decoding avoiding inaccurate reading of dataforms.
Patent
Structure and method for secure image transmission
Eric Fan,Carey B. Fan +1 more
TL;DR: In this paper, a page of a digitized electronic document is first divided into multiple segments arranged in a first order, and then the document is scrambled in a pseudo-random manner using a scrambling algorithm to produce a scrambled document in a digital format.
Patent
Secure viewing of display units by image superposition and wavelength separation
TL;DR: In this article, the primary image is generated in the form of a first set of wavelength bands and the secondary image is a second set of related wavelength bands, and a filter is provided to absorb the secondary images to permit secure viewing of the primary images.
Patent
Method and apparatus for providing visual display security
Andrew Goren,Arshad Masood +1 more
TL;DR: In this paper, a system for providing visual display security on a general-purpose computer, the generalpurpose computer capable of running an operating system and an application, the operating program system and application program presenting a user interface in the form of display windows, includes a display window having a default display characteristic and a computer security program operating on the general purpose computer.