Hologram watermarks for document authentications

Dittmann, Jana; Ferri, Lucilla Croce; Vielhauer, Claus

doi:10.1109/itcc.2001.918766

Cited by 12 publications

(6 citation statements)

References 3 publications

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“…This figure shows as the Fragile Image Watermarking by Computer Generated Holograms method can be applied either to Gray Scale hosting image, or to RGB Color one, working on each color channel. Different procedures to create and insert holographic watermarking can be found in literature [11][12][13][14][15]. The proposed one has the advantage to be a fragile watermarking schema more performing, due to the high quality of the inserted synthetic hologram.…”

Section: Watermarking Technique -Cgh Insertion Proceduresmentioning

confidence: 99%

“…In the first case, a JPEG compression will not affect the perception of the image, whereas in the second case it may discard some of the fine details which would render the image totally useless. Recently many authors have proposed Computer Generated Hologram Watermarking (CGH Watermarking) [11][12][13][14][15]. From this works emerge of potentiality about the possibility to use the CGH watermarking as fragile watermarking for images authentication [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Potentiality of holographic technique in fragile watermarking

Spagnolo

Santis

2006

SPIE Proceedings

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Fragile watermark is designed to detect slight changes to the watermarked image with high probability. In the security community, an integrity service is unambiguously defined as one, which insures that the sent and received data are identical. This binary definition can also be applicable to images; however it is too strict and not well adapted to this type of digital document. Indeed, in real life situations, images will be transformed. Their pixel values will therefore be modified but not the actual semantic meaning of the image. In order to provide an authentication service for still images, it is important to distinguish between malicious manipulations, which consist of changing the content of the original image such as captions or faces, and manipulations related to the use of an image, such as format conversion, compression, filtering, and so on. Unfortunately this distinction is not always clear; it partly depends on the type of image and its use. Scope of this paper is to present potentiality of Holographic technique in fragile watermarking for digital image authentication of medical or military images. Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/28/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx SPIE-IS&T/ Vol. 6075 607509-2 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/28/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

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Section: Watermarking Technique -Cgh Insertion Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Potentiality of holographic technique in fragile watermarking

Spagnolo

Santis

2006

SPIE Proceedings

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“…We made this manipulation to simulate an off-axis holography. It is not within the scope of this paper to explain the realization of such a type of CGH, for which references can be found in the literature [8][9][10][11][12][13][14].…”

Section: Content Fragile Watermarking Based On Computer Generated Holmentioning

confidence: 99%

Content fragile watermarking based on a computer generated hologram coding technique

Spagnolo¹,

Simonetti²,

Cozzella³

2005

J. Opt. A: Pure Appl. Opt.

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In this paper we present a content fragile watermarking based on a computer generated hologram coding technique. Content fragile watermarking techniques aim to prevent tampering and fraudulent use of modified images. A content fragile watermark monitors the integrity of the content of the image but not its numerical representation. Therefore, the watermark is designed so that the integrity is proven if the content of the image has not been tampered with. However, if parts of the image are replaced, the watermark information should indicate evidence of forgery. Using computer generated hologram watermarking, the embedded mark could be easily recovered by means of a Fourier transform. Due to this fact the host image can be tampered with and watermarked with the same holographic pattern. To avoid this possibility we have introduced an encryption method using a private key. The proposed technique is suitable for use for freelancers' photography authentication. It could be applied to colour images as well as to grey-scale ones. The proposed schema is based on the knowledge of the original mark from the authentication entity, to apply image correlation between this and the extracted one.

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“…They have to make sure that their trademark is adequately protected against the menace. A myriad of technologies [1], such as holograms [2], RFID [3]- [5] ou NFC tags [6], [7], biometric markers or inks [8],. .…”

Section: Introduction and State Of Artmentioning

confidence: 99%

A Watermarking Technique to Secure Printed Matrix Barcode—Application for Anti-Counterfeit Packaging

Nguyen¹,

Retraint²,

Morain-Nicolier³

et al. 2019

IEEE Access

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Counterfeiting of consumer goods is a critical problem which causes various negative impacts for consumers, enterprises and the whole economic ecosystem. Anti-counterfeit labels and packaging is one of the main solutions to help enterprises protect their brand against this concern. In this paper, we introduced a novel watermarking technique, which embeds a particular random micro-texture into a matrix barcode and transforms this one into a security layer for making packaging anti-counterfeited. The secured matrix barcode is hard to be reproduced by counterfeiters. In fact, any degradations caused by the counterfeiting process will change the statistical behaviors of the embedded micro-texture. Statistical detectors based on the hypothesis testing framework are also introduced to classify authentic and counterfeited printed barcodes. Experimental results confirm the usability and the effectiveness of the proposed anti-counterfeiting solution.INDEX TERMS Anti-counterfeiting, printed watermarking, matrix code, statistical hypothesis testing. III. DESCRIPTION OF W-QR CODEA. CONCEPT

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Hologram watermarks for document authentications

Cited by 12 publications

References 3 publications

Potentiality of holographic technique in fragile watermarking

Potentiality of holographic technique in fragile watermarking

Content fragile watermarking based on a computer generated hologram coding technique

A Watermarking Technique to Secure Printed Matrix Barcode—Application for Anti-Counterfeit Packaging

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