On the Security of a Certified E-Mail Scheme with Temporal Authentication

Shao, Minhua; Zhou, Jianying; Wang, Guilin

doi:10.1007/11424857_77

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…A fragile watermarking scheme for authenticating vector maps was put forward by C.Y. Shao et al(2005). Some decimal part of the coordinates of vertex is first extracted to form integer, then the lossless compressed watermark is embedded into the non-intersecting groups of the original points.…”

Section: Fragile Watermarking For 2d Vector Graphicsmentioning

confidence: 99%

A Semi-Fragile Reversible Watermarking for 2D CAD Engineering Graphics with Accurate Tampering Localization

Long

Peng

Liu

2015

International Journal of Digital Crime and Forensics

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A semi-fragile reversible watermarking algorithm for 2D CAD engineering graphics with accurate tampering localization is proposed. Firstly, all vertices in the 2D CAD engineering graphics are extracted and partitioned into groups. After that, the relative distance of these vertices are calculated, and the assigned group number is used as watermark. Finally, the watermark is embedded into the factor of relative distance by using an improved difference expansion. Experimental results and analysis show that the proposed algorithm can obtain a large capacity, good invisibility, and robust against translation, rotation, and uniform scaling. At the same time, it can detect malicious attacks such as entity modification, addition and deletion, and can locate the tampering areas with a high precision. As for the watermarked 2D CAD engineering graphics passing authentication, the original 2D CAD engineering graphics can be completely recovered. It has great potential in the application of integrity protection and content authentication of 2D CAD engineering graphics.

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Section: Fragile Watermarking For 2d Vector Graphicsmentioning

confidence: 99%

A Semi-Fragile Reversible Watermarking for 2D CAD Engineering Graphics with Accurate Tampering Localization

Long

Peng

Liu

2015

International Journal of Digital Crime and Forensics

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A Practical Certified E-Mail System with Temporal Authentication Based on Transparent TSS

Liu

Qing

et al. 2008

2008 Ninth ACIS International Conference on Software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed

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In this paper, we present a certified E-Mail system providing non-repudiation, fairness, confidentiality and temporal authentication service based on transparent TSS (Time Stamping Server). Scheme in this paper follows the generic messaging model as defined in the X.400 Message Handling System [6] and the Internet mail system [4,5] Compared with other schemes for certified e-mail, this scheme is more practical.

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On the Security of a Certified E-Mail Scheme with Temporal Authentication

Cited by 2 publications

References 11 publications

A Semi-Fragile Reversible Watermarking for 2D CAD Engineering Graphics with Accurate Tampering Localization

A Semi-Fragile Reversible Watermarking for 2D CAD Engineering Graphics with Accurate Tampering Localization

A Practical Certified E-Mail System with Temporal Authentication Based on Transparent TSS

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