scholarly journals Implementasi Metode Secure Hash Algorithm-1 Untuk Mendeteksi Keaslian File Dokumen

2021 ◽  
Vol 2 (4) ◽  
pp. 227-234
Author(s):  
Dermawan Lumban Toruan
Keyword(s):  
Data Transmission ◽  
Data Security ◽  
Hash Function ◽  
Data Confidentiality ◽  
Hash Algorithm ◽  
Secure Hash Algorithm ◽  
Data Theft ◽  
Cryptographic Techniques

Document file is a means of transforming information from one person to another or from a group to another. The development of computerized technology has greatly increased. Document files are very vulnerable to fraud, eavesdropping or data theft by irresponsible parties. In order to maintain the security of document files, this can be done by using cryptographic techniques. Cryptography is the science of keeping data secure. Cryptography is one of the data security methods that can be used to maintain data authenticity, data confidentiality, and the authenticity of data transmission. SHA, which stands for Secure Hash Algorithm, is a standard hash function published by NIST (National Institute of Standards and Technology), (NIST, 1995a). This study will use the SHA-1 method to secure the authenticity of document files, document confidentiality, document integrity, and document authentication. This study describes the security process for detecting the authenticity of document files using the SHA-1 method in the form of detection so that confidential documents sent via public telecommunications cannot be changed or modified by unauthorized persons or unauthorized persons. This is done as an effort to minimize acts of fraud, hoaxes, or misuse of document files.

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 A Study on the Optimization of Blockchain Hashing Algorithm Based on PRCA

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Jinhua Fu ◽  
Sihai Qiao ◽  
Yongzhong Huang ◽  
Xueming Si ◽  
Bin Li ◽  
...  
Keyword(s):  
Supply Chain ◽  
Internet Of Things ◽  
Data Transmission ◽  
Reconfigurable Computing ◽  
Hash Function ◽  
Network Data ◽  
Supply Chain Finance ◽  
Hash Algorithm ◽  
Hashing Function ◽  
Hashing Algorithm

Blockchain is widely used in encrypted currency, Internet of Things (IoT), supply chain finance, data sharing, and other fields. However, there are security problems in blockchains to varying degrees. As an important component of blockchain, hash function has relatively low computational efficiency. Therefore, this paper proposes a new scheme to optimize the blockchain hashing algorithm based on PRCA (Proactive Reconfigurable Computing Architecture). In order to improve the calculation performance of hashing function, the paper realizes the pipeline hashing algorithm and optimizes the efficiency of communication facilities and network data transmission by combining blockchains with mimic computers. Meanwhile, to ensure the security of data information, this paper chooses lightweight hashing algorithm to do multiple hashing and transforms the hash algorithm structure as well. The experimental results show that the scheme given in the paper not only improves the security of blockchains but also improves the efficiency of data processing.

scholarly journals BNRDT: When Data Transmission Meets Blockchain

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Hongjian Jin ◽  
Xingshu Chen ◽  
Xiao Lan ◽  
Hui Guo ◽  
Hongxia Zhang ◽  
...  
Keyword(s):  
Digital Signature ◽  
Data Transmission ◽  
Data Security ◽  
Distributed Networks ◽  
Public Key Infrastructure ◽  
Third Party ◽  
Short Message ◽  
Data Confidentiality ◽  
Transmission Scheme ◽  
Almost All

Data transmission exists in almost all the Internet-based applications, while few of them consider the property of nonrepudiation as part of data security. If a data transmission scheme is performed without the endorsement of a trusted third party (TTP) or a central server, it is easy to raise disputes while transmitting valuable data, especially digital goods, because a dishonest participant can deny the fact of particular data transmission instance. The above problem can be solved by signing and encrypting. However, digital signature schemes usually assume public key infrastructure (PKI), increasing the burden on certificate management and are not suitable for distributed networks without TTP such as blockchain. To solve the above problems, we propose two new schemes for nonrepudiation data transmission based on blockchain (we call it BNRDT): one for short message transmission and the other for large file transmission. In BNRDT schemes, nonrepudiation evidence of data transmission is generated and stored on the blockchain to satisfy both the properties of nonrepudiation (including nonrepudiation of origin and nonrepudiation of receipt) and data confidentiality. We implement and test the schemes on Hyperledger Fabric. The experimental results show that the proposed schemes can provide appealing performance.

scholarly journals A Lightweight Hash-Based Blockchain Architecture for Industrial IoT

2019 ◽  
Vol 9 (18) ◽  
pp. 3740 ◽  
Author(s):  
Byoungjin Seok ◽  
Jinseong Park ◽  
Jong Hyuk Park
Keyword(s):  
Hash Function ◽  
Data Integrity ◽  
Distributed Network ◽  
Blockchain Technology ◽  
Efficient Management ◽  
Hash Algorithm ◽  
Industrial Iot ◽  
Performance Area ◽  
Cryptographic Techniques ◽  
The Internet Of Things

Blockchain is a technology that can ensure data integrity in a distributed network, and it is actively applied in various fields. Recently, blockchain is gaining attention due to combining with the Internet of Things (IoT) technology in the industrial field. Moreover, many researchers have proposed the Industrial IoT (IIoT) architecture with blockchain for data integrity and efficient management. The IIoT network consists of many heterogeneous devices (e.g., sensors, actuators, and programmable logic controllers (PLC)) with resources-constrained, and the availability of the network must be preferentially considered. Therefore, applying the existed blockchain technology is still challenging. There are some results about the technique of constructing blockchain lightly to solve this challenge. However, in these results, the analysis in perspective of cryptographic performance (area, throughput, and power consumption) has not been considered sufficiently, or only focused on the architecture of the blockchain network. The blockchain technology is based on cryptographic techniques, and the main part is a cryptographic hash function. Therefore, if we construct the blockchain-based IIoT architecture, we have to consider the performance of the hash function. Many lightweight hash functions have been proposed recently for the resource-constrained environment, and it can also be used to the blockchain. Therefore, in this paper, we analyze the considerations of lightweight blockchain for IIoT. Also, we conduct an analysis of lightweight hash for blockchain, and propose a new lightweight hash-based blockchain architecture that can change the hash algorithm used for mining adjust to network traffic.

scholarly journals Implementasi Secure Hash Algorithm-1 Untuk Pengamanan Data Dalam Library Pada Pemrograman Java

2015 ◽  
Vol 1 (1) ◽  
pp. 57 ◽  
Author(s):  
Komang Aryasa ◽  
Yeyasa Tommy Paulus
Keyword(s):  
Data Security ◽  
Value Of Information ◽  
String Length ◽  
Java Programming ◽  
Programming Library ◽  
Hash Algorithm ◽  
Secure Hash Algorithm ◽  
Message Digest ◽  
Original Message ◽  
Made In

Masalah Keamanan merupakan salah satu aspek penting dari sistem informasi. Begitu pentingnya nilai informasi menyebabkan seringkali informasi diinginkan oleh orang tertentu kemudian dapat memodifikasi informasi tersebut. Untuk dapat mengesahkan informasi yang didapatkan, maka harus dilakukan authentication pada informasi sehingga diketahui keaslian informasi. Dalam penelitian ini diimplementasikan suatu metode secure hash algorithm-1, sehingga penerima informasi dapat mengetahui adanya perubahan terhadap data penting yang diterima dari pihak lain. Metode ini mampu membangkitkan nilai hash dari sebuah string atau file. Dengan perubahan sekecil apapun pada informasi yang diterima, dapat diketahui keasliannya. Secure Hash Algorithm adalah fungsi hash yang bekerja satu arah, ini berarti pesan yang sudah diubah menjadi message digest tidak dapat dikembalikan menjadi pesan semula. Dua pesan yang berbeda akan selalu menghasilkan nilai hash yang berbeda pula. Hasil rancangan perangkat lunak ini dengan input panjang string yang berbeda akan menghasilkan output dengan panjang string tetap yaitu 160 bit, yang dapat dibuat dalam bentuk library pada pemrograman java sehingga dapat langsung digunakan untuk proses otentikasi dan keamanan data.Security problem is one of the important aspects of the information system. Once the importance of the value of information causes information is often desired by a particular person can then modify that information. To be able to certify that the information obtained, it must be done so that the authentication on the information known to the authenticity of the information. In this study implemented a method of secure hash algorithm-1, so that the recipient can know the information of changes to important data received from the other party. This method is able to generate a hash value from a string or file. With the slightest change to the information received, it is known authenticity. Secure Hash Algorithm is a hash function that works in one direction, this means that the message has been converted into a message digest can not be restored to its original message. Two different messages will always produce a different hash value. Software design results with different input string length would produce output with fixed string length is 160 bits, which can be made in the form of the Java programming library that can be directly used for authentication and data security.

scholarly journals Application of Gost Algorithm For The Safety of Data Sending of General Election

Elkawnie ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 121
Author(s):  
Novan Wijaya
Keyword(s):  
Data Transmission ◽  
Data Security ◽  
Rapid Development ◽  
Government Agency ◽  
The Internet ◽  
Internet Media ◽  
Election Results ◽  
Cryptographic Techniques ◽  
Data Efficiency ◽  
Regional Elections

Abstract : The rapid development of the internet has an impact on the security of data sent using internet media. One government agency that uses the internet as data transmission includes the KPU. Data transmission becomes very risky especially the data sent is very important and even confidential. In the internet world, there are many threats and ways to change or retrieve data sent via the internet. Indonesia in particular has conducted direct elections but the data that are in the regions which are the results of recapitulation of the elections will be sent via the internet with a system provided by the KPU. Data from the recapitulation of regional elections becomes very important because it can be changed by intruders. Secure the data sent, methods such as cryptographic techniques that can minimize interference from intruders are needed. One algorithm that can be applied as data security is the GOST algorithm. The GOST algorithm is designed to take a balance between data efficiency and security. Cryptographic techniques that use the GOST algorithm are expected to be able to increase the security of sending election results from various threats without reducing the performance of sending data. The rapid development of the internet has the impact of the security of data sent using internet media. One government agency that uses the internet as data transmission includes the KPU. Data transmission becomes very risky especially the data sent is very important and even confidential. In the internet world, there are many threats and ways to change or retrieve data sent through internet media. Indonesia in particular has conducted direct elections but the data that are in the regions which are the results of recapitulation of the elections will be sent via the internet with a system provided by the KPU. Data from the recapitulation of regional elections becomes very important because it can be changed by intruders. Secure the data sent, methods such as cryptographic techniques that can minimize interference from intruders are needed. One algorithm that can be applied as data security is the GOST algorithm. The GOST algorithm is designed to take a balance between data efficiency and security. Cryptographic techniques that use GOST algorithm can improve the security of sending election results from various threats without reducing the performance of sending data. Election result data that was conducted during the testing was the Ogan Ilir regional election recap data. Tests that have been carried out using the GOST algorithm using WireShark produce stream files sent over the network are not easily identified because they are converted into random strings, so it takes a long time to analyze them.Abstrak : Perkembangan internet yang sangat cepat mempunyai dampak diantranya keamanan data yang dikirim menggunakan media internet. Salah satu instansi pemerintahan yang menggunakan internet sebagai pengiriman data diantaranya KPU. Pengiriman data menjadi sangat beresiko terlebih data yang dikirimkan sangat penting bahkan bersifat rahasia. Didunia internet terdapat banyak ancaman serta cara dalam mengubah atau mengambil data yang dikirimkan melalui media internet. Indonesia pada khususnya telah melakukan pemilu secara langsung tetapi data-data yang berada pada daerah yang merupakan hasil rekapitulasi dari pemilu akan dikirimkan melalui internet dengan sistem yang telah disediakan oleh KPU. Data hasil rekapitulasi pemilu suatu daerah menjadi sangat penting dikarenakan bisa diubah oleh intruder. Untuk mengamankan data yang dikirimkan diperlukan metode seperti teknik kriptografi yang bisa meminimalisir gangguan dari para intruder. Salah satu algoritma yang bisa diterapkan sebagai keamanan data yaitu algoritma GOST. Algoritma GOST dirancang agar mengambil keseimbangan antara efisiensi dan keamanan data. Teknik kriptografi yang menggunakan algoritma GOST mampu meningkatkan keamanan pengiriman data hasil pemilu dari berbagai ancaman tanpa mengurangi performansi dari pengiriman data. Data hasil pemilu yang dilakukan saat pengujian ialah data rekap pilkada Ogan Ilir. Pengujian yang telah dilakukan menggunakan algoritma GOST menggunakan wireshark menghasilkan stream file yang dikirim melalui jaringan tidak mudah diidentifikasi dikarenakan diubah menjadi string acak sehingga membutuhkan waktu yang lama untuk menganalisanya.

scholarly journals Eauction Web & App Synced Smart Agriculture using Iot

2019 ◽  
Vol 8 (2S4) ◽  
pp. 209-212
Keyword(s):  
Hash Function ◽  
Online Auctions ◽  
Water System ◽  
Leaf Wetness ◽  
Important Process ◽  
Hash Algorithm ◽  
Secure Hash Algorithm ◽  
Web App ◽  
Smart Agriculture ◽  
Financial Transactions

Agribusiness is the most important process in our Nation. But nowadays, because of movement of individuals from provincial to urban there is prevention in agriculture. So to conquer this issue we go for shrewd horticulture procedures utilizing IoT. This undertaking incorporates different highlights like GPS based remote controlled checking, dampness and temperature detecting, gatecrashers startling, security, leaf wetness and legitimate water system offices. To ensure the safety of their financial transactions new crypto graphical algorithms was introduced already. We are making one such website and app for placing online auctions and providing an audience to them. The app has been designed using RESTful - API to sync its database with the website. And to encrypt the transactions we will be using SHA-256, a one way crypto-hash function, which only encrypts the data and doesn't decrypt it, making it a secure Hash Algorithm

scholarly journals Analisa Algoritma SHA-256 Untuk Mendeteksi Orisinalitas Citra Digital

2019 ◽  
Vol 1 ◽  
pp. 164
Author(s):  
Imam Saputra ◽  
Surya Darma Nasution
Keyword(s):  
Digital Image ◽  
Hash Function ◽  
Digital Images ◽  
Digital Era ◽  
Hash Algorithm ◽  
Job Application ◽  
Secure Hash Algorithm ◽  
Original File ◽  
One Way Function

In the digital era, changing human habits, one of the changing habits is in applying for someone's job. Before the digital era, applying for a job by sending an application to the address of the destination company. In the digital era, as now, applying for jobs can be done boldly, and sent in softcopy. This softcopy file forms a digital image that can be easily manipulated. How would it be difficult for the receiving committee to determine the original file with the manipulated a file. With the existing questions, we need a technique that can be used to request the originality of the job application file. One technique that can be used is the hash function that exists in cryptography. The hash function is a one-way function that can be used to find a message. If applied to digital images, the originality of the image can be recognized. The algorithm in the hash function used is Secure Hash Algorithm 256 (SHA256) until now this algorithm cannot be solved by cryptanalysts. By applying the Secure Hash Algorithm 256 algorithm, it will make it easier and faster to access the originality of digital images.

scholarly journals Cryptography with Layered Algorithms for Text Security on Android

2020 ◽  
Vol 3 (2) ◽  
pp. 35-39
Author(s):  
Ery Safrianti ◽  
Fernanda Fitriansyah
Keyword(s):  
Data Security ◽  
Text Messages ◽  
Digital Data ◽  
Original Text ◽  
Short Message ◽  
Test Results ◽  
Text Data ◽  
Android Applications ◽  
Data Theft ◽  
Cryptographic Techniques

Android phone is one of the most widely used telecommunications devices today. The exchange of various forms of information ranging from text, sound, images and video through this media is inseparable from the threat of criminal crime through digital data theft. Data security aspects are very important to be considered, one of which is data in the form of text. Text data is commonly used in short message services (SMS), chat in various Android applications or in the use of logins and passwords. This research will create an application on Android for securing text data through cryptographic techniques with a layered algorithm using three types of algorithms namely Caesar, Blowfish and AES Algorithms (Advanced Standard Encryption). This application can run on Android 5.0 (lollipop) or above, which can be used to encrypt and decrypt text messages. The test results show that the results of the initial text that was encoded through the encryption process can be safely returned by the decryption process without the slightest mistake with the original text.  The encryption test for capital letters, numbers, and punctuation can be completely decrypted.

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