Securing the Integrity of PDF Files using RSA Digital Signature and SHA-3 Hash Function

2021 ◽  
Author(s):  
Amer Sharif ◽  
Dewi S. Ginting ◽  
Arya D. Dias
Keyword(s):  
Digital Signature ◽  
Hash Function

scholarly journals Implementation of Digital Signature Using Hybrid Cryptosystem

2018 ◽  
Vol 7 (3.4) ◽  
pp. 34
Author(s):  
Leela K ◽  
Smitha Vinod
Keyword(s):  
Digital Signature ◽  
Hash Function ◽  
Data Transfer ◽  
Security Level ◽  
Electronic Data ◽  
Hybrid Encryption ◽  
Asymmetric Cryptography

Security is a major concern when it comes to electronic data transfer. Digital signature uses hash function and asymmetric algorithms to uniquely identify the sender of the data and it also ensures integrity of the data transferred. Hybrid encryption uses both symmetric and asymmetric cryptography to enhance the security of the data. Digital Signature is used to identify the owner of the document but it does not hide the information while transferring the document. Anyone can read the message. To avoid this, data sent along with the signature should be secured. In this paper, Digital signature is combined with hybrid encryption to enhance the security level. Security of the data or the document sent is achieved by using hybrid encryption technique along with digital signature. 

scholarly journals Digital Signature for data and documents using operating PKI certificates

2021 ◽  
Vol 119 ◽  
pp. 07004
Author(s):  
Adil El Mane ◽  
Younes Chihab ◽  
Redouan Korchiyne
Keyword(s):  
Digital Signature ◽  
Hash Function ◽  
Encryption Algorithm ◽  
Central Theme ◽  
Digital Certificates ◽  
Sign Method

This report represents my researching work for a six-month internship in Lex Persona Enterprise. "The implementation of applications that sign data and files electronically using operating digital certificates" is the central theme of this research. This project brings together many applications related to compliance with well-specified programming constraints to sign files electronically. The research has the goal of signing PDF documents digitally using the hash-and-sign method. The SHA-256 function as the hash function and RSA as encryption algorithm, accompanied with PKI certificates type X.509. The link between the applications and the certificates is the cryptographic API PKCS #11. This humbled work got dedicated to smartphones and computers. The use of WebView in all applications provides a taste of consistency. This article presents several processes carried out to accomplish this work.

A Secure Cloud Based Digital Signature Application for IoT

2018 ◽  
Vol 10 (3) ◽  
pp. 42-60 ◽  
Author(s):  
Sahar A. El-Rahman ◽  
Daniyah Aldawsari ◽  
Mona Aldosari ◽  
Omaimah Alrashed ◽  
Ghadeer Alsubaie
Keyword(s):  
Internet Of Things ◽  
Elliptic Curve ◽  
Digital Signature ◽  
Mobile Application ◽  
Hash Function ◽  
Advanced Encryption Standard ◽  
Cloud Environment ◽  
Electronic Documents ◽  
Message Source ◽  
Digital Signature Algorithm

IoT (Internet of Things) is regarded as a diversified science and utilization with uncommon risks and opportunities of business. So, in this article, a digital signature mobile application (SignOn) is presented where, it provides a cloud based digital signature with a high security to sustain with the growth of IoT and the speed of the life. Different algorithms were utilized to accomplish the integrity of the documents, authenticate users with their unique signatures, and encrypt their documents in order to provide the best adopted solution for cloud-based signature in the field of IoT. Where, ECDSA (Elliptic Curve Digital Signature Algorithm) is utilized to ensure the message source, Hash function (SHA-512) is used to detect all information variations, and AES (Advanced Encryption Standard) is utilized for more security. SignOn is considered as a legal obligated way of signing contracts and documents, keeping the data in electronic form in a secure cloud environment and shortens the duration of the signing process. Whereas, it allows the user to sign electronic documents and then, the verifier can validate the produced signature.

scholarly journals A Survey: Cryptographic Hash Functions for Digital Stamping

2019 ◽  
Vol 54 (6) ◽  
Author(s):  
Israa Ezzat Salem ◽  
Adil M. Salman ◽  
Maad M. Mijwil
Keyword(s):  
Computer Science ◽  
Digital Signature ◽  
Data Security ◽  
Hash Function ◽  
Hash Functions ◽  
Mathematical Science ◽  
Integrity Verification ◽  
General Overview ◽  
Rootkit Detection ◽  
Cryptographic Hash Functions

The current study aims to examine a general overview of the application of hash functions in cryptography and study the relationships between cryptographic hash functions and uses of the digital signature. Functions of the cryptographic hash are an important tool applied in several sections of data security, and application of hash function is common and used for various purposes such as File Integrity Verification, Key Derivation, Time stamping, Password Hashing, Rootkit Detection and Digital Signature. Digital Signature is a code that is linked electronically with the document including the sender's identity. Therefore, the digital signature is of high value in verifying digital messages or documents. Cryptographic hash functions do not present without mathematics. The success of computer science is attributed to mathematics; in other words, it is because of mathematical science, that computer science was understood and could be explained to all. The study aims to teach the reader hash functions and its applications such as digital signature and to show in details some hash functions and their designing.

scholarly journals Data Integrity and Security using Keccak and Digital Signature Algorithm (DSA)

2019 ◽  
Vol 13 (3) ◽  
pp. 273
Author(s):  
Muhammad Asghar Nazal ◽  
Reza Pulungan ◽  
Mardhani Riasetiawan
Keyword(s):  
Digital Signature ◽  
Data Security ◽  
Hash Function ◽  
Digital Signatures ◽  
Literature Study ◽  
Data Verification ◽  
Digital Signature Algorithm ◽  
Hash Algorithm ◽  
Secure Hash Algorithm ◽  
Better Than

Data security is a very important compilation using cloud computing; one of the research that is running and using cloud technology as a means of storage is G-Connect. One of the developments made by the G-Connect project is about data security; most of the problems verification of the data sent. In previous studies, Keccak and RSA algorithms have implemented for data verification needs. But after a literature study of other algorithms that can make digital signatures, we found what is meant by an algorithm that is better than RSA in rectangular speeds, namely Digital Signature Algorithm (DSA).DSA is one of the key algorithms used for digital signatures, but because DSA still uses Secure Hash Algorithm (SHA-1) as an algorithm for hashes, DSA rarely used for data security purposes, so Keccak is used instead of the hash algorithm on DSA. Now, Keccak become the standard for the new SHA-3 hash function algorithm. Because of the above problems, the focus of this research is about data verification using Keccak and DSA. The results of the research are proven that Keccak can run on DSA work system, obtained a comparison of execution time process between DSA and RSA where both use Keccak.

Digital Image Protection using Keyed Hash Function

2012 ◽  
Vol 2 (2) ◽  
pp. 36-47 ◽  
Author(s):  
Siva Charan Muraharirao ◽  
Manik Lal Das
Keyword(s):  
Digital Image ◽  
Digital Signature ◽  
Hash Function ◽  
Image Authentication ◽  
Experimental Results ◽  
Public Key ◽  
Message Authentication ◽  
Authentication Codes ◽  
Message Authentication Codes ◽  
Image Protection

Digital image authentication is an essential attribute for protecting digital image from piracy and copyright violator. Anti-piracy, digital watermarking, and ownership verification are some mechanisms evolving over the years for achieving digital image authentication. Cryptographic primitives, such as hash function, digital signature, and message authentication codes are being used in several applications including digital image authentication. Use of Least Significant Bit (LSB) is one of the classical approaches for digital image authentication. Although LSB approach is efficient, it does not provide adequate security services. On the other hand, digital signature-based image authentication provides better security, but with added computational cost in comparison with LSB approach. Furthermore, digital signature-based authentication approach requires managing public key infrastructure. Considering security weakness of LSB-based approach and cost overhead of public key based approach, the authors present a digital image authentication scheme using LSB and message authentication codes (MAC). The MAC-based approach for authenticating digital image is secure and efficient approach without public key management overhead. The authors also provide experimental results of the proposed scheme using MATLAB. The experimental results show that the proposed scheme is efficient and secure in comparisons with other schemes.

scholarly journals Desain dan Implementasi Mekanisme Tanda Tangan Dijital Dalam Pertukaran Data Dengan Hash MD5 dan Enkripsi/Dekripsi Menggunakan Algoritma RSA

2018 ◽  
Author(s):  
Junaidy Budi Sanger
Keyword(s):  
Digital Signature ◽  
Information Exchange ◽  
Hash Function ◽  
Data Transfer ◽  
Data Integrity ◽  
Digital Signatures ◽  
Rsa Algorithm ◽  
The Difference ◽  
Privacy Problem ◽  
Problem Data

Information exchange in a network could lead into some problems, such as privacy problem, authentication problem, data integrity problem, and non-repudiation problem. Thus, precise security acts are needed to solve those problems. Digital signature is a solution to solve those problems. Digital signature is basically just like a written signature, which is used to authenticate documents. The difference is that the written signature usually describes the name of a signer whereas the digital signature consists of cryptography codes of a message and a sender. Digital signature using hash function is one of the most used digital signatures. Unfortunately, this kind of digital signature can not solve all given problems, such as privacy problem and non repudiation problem. Therefore, RSA algorithm is needed to solve that problem. The result of this research is the implementation of digital signature along with RSA algorithm and MD5 hash function in a data transfer application.

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