Applying Statistics Ogive to Semi-Fragile Authentication of JPEG Images for Communication System

Chih-Hung  Lin; Wen-Shyong  Hsieh

doi:10.6180/jase.2006.9.2.01

Applying Statistics Ogive to Semi-Fragile Authentication of JPEG Images for Communication System

Computer Science and Information Engineering

Chih-Hung Lin This email address is being protected from spambots. You need JavaScript enabled to view it.¹ and Wen-Shyong Hsieh^1,2

¹Department of Computer Science and Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan 804, R.O.C.
²Department of Computer Science and Information Engineering, Shu Te University, Kaohsiung, Taiwan 824, R.O.C.

Received: January 13, 2005
Accepted: November 2, 2005
Publication Date: June 1, 2006

Download Citation: ||https://doi.org/10.6180/jase.2006.9.2.01

ABSTRACT

Semi-fragile image authentication methods are robust to JPEG images, but are fragile to other malicious manipulations. This paper presents a novel digital signature scheme that adopts statistic Ogive analysis in quantized discrete cosine transform (DCT) coefficients to construct a feature code for image authentication. The lower bound sensitivity of fragility can be determined by a predetermined degree of fragility corresponding to an acceptable JPEG compression quality factor. The degree of fragility can be easily adjusted by simply controlling a fragile degree factor (FDF). This paper analyzes how to choose FDF and the critical image feature properties. Experimental results indicate the effectiveness of the proposed method.

Keywords: Digital Signature, Image Authentication, JPEG, Ogive, Semi-Fragile

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