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.

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 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.

scholarly journals Post–Quantum Cryptography – A Primer

2020 ◽  
Author(s):  
P. V. Ananda Mohana
Keyword(s):  
Elliptic Curve ◽  
Quantum Cryptography ◽  
Digital Signature ◽  
Information Transfer ◽  
Discrete Logarithm ◽  
Digital Signatures ◽  
Factorization Problem ◽  
Rsa Algorithm ◽  
Digital Signature Algorithm ◽  
Post Quantum Cryptography

Traditionally, information security needed encryption, authentication, key management, non-repudiation and authorization which were being met using several techniques. Standardization of algorithms by National Institute of Standards and Technology (NIST) has facilitated international communication for banking and information transfer using these standards. Encryption can be carried out using Advanced Encryption Standard (AES) using variable block lengths (128, 192 or 256 bits) and variable key lengths (128, 192 or 256 bits). Solutions for light weight applications such as those for Internet of Things (IoT) are also being standardized. Message integrity is possible using host of hash algorithms such as SHA-1, SHA-2 etc., and more recently using SHA-3 algorithm. Authentication is possible using well known Rivest-Shamir-Adleman (RSA) algorithm needing 2048/4096 bit operations. Elliptic Curve Cryptography (ECC) is also quite popular and used in several practical systems such as WhatsApp, Blackberry etc. Key exchange is possible using Diffie-Hellman algorithm and its variations. Digital Signatures can be carried out using RSA algorithm or Elliptic Curve Digital Signature Algorithm (ECDSA) or DSA (Digital Signature Algorithm). All these algorithms derive security from difficulty in solving some mathematical problems such as factorization problem or discrete logarithm problem. Though published literature gives evidence of solving factorization problem upto 768 bits only, it is believed that using Quantum computers, these problems could be solved by the end of this decade. This is due to availability of the pioneering work of Shor and Grover [1]. For factoring an integer of N bits, Shor’s algorithm takes quantum gates. As such, there is ever growing interest in being ready for the next decade with algorithms that may resist attacks in the quantum computer era. NIST has foreseen this need and has invited proposals from researchers all over the world. In the first round, about 66 submissions were received which have been scrutinized for completeness of submissions , novelty of the approach and security and 25 of these were promote to second round to improve based on the comments received on the first round submission. These will be analyzed for security and some will be selected for final recommendation for use by industry. These are for encryption/decryption, key agreement, hashing and Digital Signatures for both hardware and software implementations. In this paper, we present a brief survey of the state of the art in post-Quantum Cryptography (PQC) followed by study of one of technique referred to as Learning With Errors (LWE) in some detail.

scholarly journals Manajemen jpeg/exif file fingerprint dengan algoritma Brute Force string matching dan Hash Function SHA256

2019 ◽  
Vol 5 (2) ◽  
pp. 140
Author(s):  
Rachmad Fitriyanto ◽  
Anton Yudhana ◽  
Sunardi Sunardi
Keyword(s):  
Digital Signature ◽  
Hash Function ◽  
String Matching ◽  
Data Integrity ◽  
Brute Force ◽  
Matching Algorithm ◽  
Digital Signature Algorithm ◽  
Image Segment ◽  
Metadata File ◽  
Fourth Step

Management of jpeg/exif file fingerprint with Brute Force string matching algorithm and Hash Function SHA256Metode pengamanan berkas gambar jpeg/exif saat ini hanya mencakup aspek pencegahan, belum pada aspek deteksi integritas data. Digital Signature Algorithm (DSA) adalah metode kriptografi yang digunakan untuk memverifikasi integritas data menggunakan hash value. SHA256 merupakan hash function yang menghasilkan 256-bit hash value yang berfungsi sebagai file fingerprint. Penelitian ini bertujuan untuk menyusun file fingerprint dari berkas jpeg/exif menggunakan SHA256 dan algoritma Brute Force string matching untuk verifikasi integritas berkas jpeg/exif. Penelitian dilakukan dalam lima tahap. Tahap pertama adalah identifikasi struktur berkas jpeg/exif. Tahap kedua adalah akuisisi konten segmen. Tahap ketiga penghitungan hash value. Tahap keempat adalah eksperimen modifikasi berkas jpeg/exif. Tahap kelima adalah pemilihan elemen dan penyusunan file fingerprint. Hasil penelitian menunjukkan sebuah jpeg/exif file fingerprint tersusun atas tiga hash value. SOI (Start of Image) segment hash value digunakan untuk mendeteksi terjadinya modifikasi berkas dalam bentuk perubahan tipe berkas dan penambahan objek pada konten gambar. Hash value segmen APP1 digunakan untuk mendeteksi modifikasi pada metadata berkas. Hash value segmen SOF0 digunakan untuk mendeteksi gambar yang dimodifikasi dengan teknik recoloring, resizing, dan cropping. The method of securing jpeg/exif image files currently has covered only the prevention aspect instead of the data integrity detection aspect. Digital Signature Algorithm is a cryptographic method used to verify the data integrity using hash value. SHA256 is a hash function that produces a 256-bit hash value functioning as a fingerprint file. This study aimed at compiling fingerprint files from jpeg/exif files using SHA256 and Brute Force string matching algorithm to verify the integrity of jpeg/exif files. The research was conducted in five steps. The first step was identifying the jpeg/exif file structure. The second step was the acquisition of the segment content. The third step was calculating the hash value. The fourth step was the jpeg/exif file modification experiment. The fifth step was the selection of elements and compilation of fingerprint files. The obtained results showed a jpeg/exif fingerprint file which was compiled in three hash values. The hash value of SOI segment was used to detect the occurrence of file modification in the form of file type changing and object addition on the image content. The hash value of APP1 segment was used to detect the metadata file modification. The hash value of SOF0 segment was used to detect the images modified by recoloring, resizing, and cropping techniques.

scholarly journals Digital Signs Security System using AES-Blowfish-RSA Hybrid Cryptography Approach

SinkrOn ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 185 ◽  
Author(s):  
Christnatalis HS ◽  
Amir Mahmud Husein
Keyword(s):  
Digital Signature ◽  
Digital Signatures ◽  
Analysis Framework ◽  
Public And Private ◽  
Second Stage ◽  
Rsa Algorithm ◽  
Public Keys ◽  
Kohonen Som ◽  
Two Stages ◽  
Method Approach

Increasing application of digital signatures in legitimate authentication of administrative documents in both public and private environments is one of the points of concern, especially the issue of security and integrity of ownership of signatures. Digital signature is a mathematical scheme, which a unit to identify and prove the authenticity of the owner of the message or document. The study aims to analyze security patterns and identification of digital signatures on documents using the RSA-AES-Blowfish hybrid cryptographic method approach for securing digital signatures, while the Kohonen SOM method is applied to identify ownership recognition of signature images. The analysis framework used in this study is each signature will be stored in the form of a digital image file that has been encrypted using hybrid method of AES-Blowfish with the SHA 256 hash function. Process of forming private keys and public keys in the signature image using the RSA algorithm. Authentic verification of the use of digital signatures on the document has 2 (two) stages, the first stage is signature will be valid used on the document if the result of hashing the selected signature image is the same based on the private key and public key entered by the user, while the second stage identification is done using the Kohonen SOM method to validate the similarity of the chosen signature with the ownership of the signature.

Implementasi Sistem Otentikasi Dokumen Berbasis Quick Response (QR) Code dan Digital Signature

2021 ◽  
Vol 5 (4) ◽  
pp. 663-671
Author(s):  
Antika Lorien ◽  
Theophilus Wellem
Keyword(s):  
Digital Signature ◽  
Hash Function ◽  
Data Exchange ◽  
Digital Signatures ◽  
Qr Code ◽  
Quick Response ◽  
Digital Documents ◽  
Message Digest ◽  
Authentication System ◽  
Encryption Decryption

The authenticity and integrity of documents are essential in data exchange and communication. Digital documents must be verifiable for their authenticity and integrity by all parties that use the documents. Generally, digital documents can be authenticated by using digital signatures. This study aims to implement a document authentication system based on Quick Response (QR) code and digital signature. As the case study, the document authentication system is implemented to generate digital signatures for student’s certificate documents. Furthermore, the system can also verify the authenticity of the certificate documents. Creating a digital signature requires a hash function algorithm for generating the message digest of the document. In addition, an algorithm to generate the public key and the private key used in the encryption/decryption of the message digest is also needed. The hash function utilized in this study is the Secure Hash Algorithm-256 (SHA-256), while the algorithm used for encryption/decryption is the Rivest-Shamir-Adleman (RSA) algorithm. The system is evaluated by verifying 30 student certificate documents, of which 15 of them were certificates with QR code signature generated by the system and the other 15 were certificates with QR code signature generated using a random QR code generator. The system’s testing results demonstrate that the system can ensure the authenticity and integrity of the signed certificate documents to prevent document falsification. All documents that contain random QR codes were correctly identified as false documents.  

WS-Security on PRODML

2014 ◽  
Vol 1 (1) ◽  
pp. 9-34
Author(s):  
Bobby Suryajaya
Keyword(s):  
Web Services ◽  
Digital Signature ◽  
Data Transfer ◽  
Web Services Security ◽  
Soap Message ◽  
Simulation Results ◽  
End To End

SKK Migas plans to apply end-to-end security based on Web Services Security (WS-Security) for Sistem Operasi Terpadu (SOT). However, there are no prototype or simulation results that can support the plan that has already been communicated to many parties. This paper proposes an experiment that performs PRODML data transfer using WS-Security by altering the WSDL to include encryption and digital signature. The experiment utilizes SoapUI, and successfully loaded PRODML WSDL that had been altered with WSP-Policy based on X.509 to transfer a SOAP message.

Data Integrity

2017 ◽  
Author(s):  
Keith M. Martin
Keyword(s):  
Hash Function ◽  
Hash Functions ◽  
Data Integrity ◽  
Message Authentication ◽  
Authenticated Encryption ◽  
Authentication Codes ◽  
Basic Model ◽  
Function Design ◽  
Security Properties ◽  
Different Levels

This chapter discusses cryptographic mechanisms for providing data integrity. We begin by identifying different levels of data integrity that can be provided. We then look in detail at hash functions, explaining the different security properties that they have, as well as presenting several different applications of a hash function. We then look at hash function design and illustrate this by discussing the hash function SHA-3. Next, we discuss message authentication codes (MACs), presenting a basic model and discussing basic properties. We compare two different MAC constructions, CBC-MAC and HMAC. Finally, we consider different ways of using MACs together with encryption. We focus on authenticated encryption modes, and illustrate these by describing Galois Counter mode.

Data Transfer from Clinic to Clinic – Queensland Perspective

OP-Journal ◽  
2021 ◽  
Author(s):  
Genevieve Westacott ◽  
Kirsten Vallmurr ◽  
Michael Schütz
Keyword(s):  
Information Exchange ◽  
Data Transfer ◽  
Data Communication ◽  
The State ◽  
Evolutionary Trend ◽  
Quality Healthcare ◽  
Digital Revolution ◽  
Critical Data ◽  
Secure Information ◽  
Security Standards

AbstractData transfer has been forced to evolve as digital technologies are implemented throughout various aspects of the healthcare system. Despite the uniqueness of both the geography and the population of Queensland, information exchange and data communication has continued to follow this evolutionary trend. There have been a number of different health reforms designed to integrate digital innovations and allow critical data and information to be shared with the appropriate health professionals when necessary. Strict healthcare legislation has been navigated and to provide newly upgraded technologies and processes while maintaining privacy, confidentiality and security standards. A large portion of the digital revolution has been the implementation of the national run project, the My Health Record and the state run project, the Integrated Electronic Medical Record. Both are platforms that allow secure information exchange allowing patients to have improved quality of care. To maintain the steady progress, both the state and federal governments have developed strategies and visions to help provide guidance and direct for ongoing and future digital projects. They also outline areas that require further advancements to ensure Queensland is delivering equitable, high quality healthcare.

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