Protection of Integrity and Ownership of PDF Documents Using Invisible Signature

Shaikhli, Imad Fakhri Al; Zeki, Akram M.; Makarim, Rusydi H.; Pathan, Al-Sakib Khan

doi:10.1109/uksim.2012.81

Cited by 8 publications

(7 citation statements)

References 15 publications

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“…Berdasarkan uraian pada pendahuluan dan paragraf sebelumnya maka peneliti menetapkan bahwa algortima yang cocok untuk kebutuhan ini adalah DSA. Berdasarkan beberapa penelitian terdahulu, algoritma ini mampu melakukan generating and identifying pada key dan dokumen yang dikirim ke penerima sehingga keabsahan dan integritas dokumen dapat terjaga (Nuraeni, Agustin and Muharam, 2018;Al Shaikhli et al, 2012;Lakshmanan and Madheswaran, 2012…”

Section: Metode Penelitianunclassified

Pemeriksaan Integritas Dokumen Dengan Digital Signature Algorithm

Arisandi

Yusuf

Sukri

2020

JOISIE

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Hal penting yang harus ada dalam sebuah dokumen adalah tandatangan, yang merupakan suatu ciri bahwa dokumen tersebut dapat dipertanggungjawabkan. Akan tetapi, terkadang seseorang yang akan menandatangani dokumen tidak dapat menandatanganinya karena alasan tertentu. Permasalahan ini dapat diatasi dengan penggunaan tandatangan yang terdigitasi namun melalui otentikasi dan pemeriksaan integritas sebuah dokumen dengan menggunakan DSA (Digital Signature Algorithm). DSA menggunakan kunci publik dan kunci privat, dimana kunci privat untuk membuat tandatangan digital dan kunci publik untuk memverifikasi tandatangan digital. Algoritma ini diuji pada dokumen yang dibuat di aplikasi perkantoran. Dalam penelitian ini dijelaskan bagaimana DSA dapat mengidentifikasi kecocokan pasangan kunci, dokumen, dan tanda tangan untuk memastikan bahwa dokumen yang diterima secara konsisten terjaga integritasnya dari pengirim ke penerima.

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Section: Metode Penelitianunclassified

Pemeriksaan Integritas Dokumen Dengan Digital Signature Algorithm

Arisandi

Yusuf

Sukri

2020

JOISIE

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“…The fragile watermark is embedded in the spatial domain using the least significant bit (LSB) method. The Hash key is generated by using SHA-256 hash function [8,9]. Fig.…”

Section: Embedding the Watermark Signalsmentioning

confidence: 99%

A new watermarking algorithm for scanned colored PDF files using DWT and hash function

Mahmoud

Maharmeh

Al-Ahmad

2015

2015 International Conference on Information and Communication Technology Research (ICTRC)

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This paper discusses a technique used to insert a watermark into scanned colored PDF files. The watermarking aims to protect the copyright ownership and authenticate the PDF documents. A logo has been used as a robust watermark for copyright. The logo will be embedded in the green channel of the file. This watermark can be successfully extracted and it can survive against different attacks. Any manipulations in the PDF file will cause the second fragile watermark to change and indicate forgery. The algorithm was successfully tested on different colored PDF files.

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“…Several studies related to the technique of proving ownership of pdf files have been done before, including: digital signature insertion in the xref pdf section [7], the use of watermaking inserted at xref pdf [8]. In study [7], insertion is done by overwriting 3 bytes character 20 ASCII or space characters in each row of xref. Inserted digital signature data cannot be perceived and does not add to the size of the file as long as the xref capacity is still sufficient.…”

Section: Introductionmentioning

confidence: 99%

“…Inserted digital signature data cannot be perceived and does not add to the size of the file as long as the xref capacity is still sufficient. But in research [7], it still cannot handle data insertion that exceeds the capacity of xref. Whereas in research [8], digital signatures are inserted in each row of xref as much as 5 bytes which have previously been compressed using the RC4 algorithm.…”

Section: Introductionmentioning

confidence: 99%