scholarly journals Implementation of Rivest Shamir Adleman Algorithm (RSA) and Vigenere Cipher In Web Based Information System

2018 ◽  
Vol 31 ◽  
pp. 10007 ◽  
Author(s):  
Aryanti Aryanti ◽  
Ikhthison Mekongga
Keyword(s):  
Data Security ◽  
Data Encryption ◽  
Public Key ◽  
Test Results ◽  
File Size ◽  
Web Based ◽  
The Public ◽  
Cryptographic Algorithm ◽  
Encryption And Decryption ◽  
The Moment

Data security and confidentiality is one of the most important aspects of information systems at the moment. One attempt to secure data such as by using cryptography. In this study developed a data security system by implementing the cryptography algorithm Rivest, Shamir Adleman (RSA) and Vigenere Cipher. The research was done by combining Rivest, Shamir Adleman (RSA) and Vigenere Cipher cryptographic algorithms to document file either word, excel, and pdf. This application includes the process of encryption and decryption of data, which is created by using PHP software and my SQL. Data encryption is done on the transmit side through RSA cryptographic calculations using the public key, then proceed with Vigenere Cipher algorithm which also uses public key. As for the stage of the decryption side received by using the Vigenere Cipher algorithm still use public key and then the RSA cryptographic algorithm using a private key. Test results show that the system can encrypt files, decrypt files and transmit files. Tests performed on the process of encryption and decryption of files with different file sizes, file size affects the process of encryption and decryption. The larger the file size the longer the process of encryption and decryption.

Design Of Hybrid Cryptography With Vigenere Cipher And RSA Algorithm On IOT Data Security

2020 ◽  
Vol 8 (4) ◽  
pp. 475
Author(s):  
Maria Okta Safira ◽  
I Komang Ari Mogi
Keyword(s):  
System Architecture ◽  
Data Security ◽  
Data Encryption ◽  
Public Key ◽  
Secret Message ◽  
Secret Key ◽  
Rsa Algorithm ◽  
Tcp Protocol ◽  
Public Keys ◽  
Encryption And Decryption

In this paper two methods are used, namely the vigenere cipher method and the RSA method. The vigenere cipher method is an example of a symmetric algorithm, while RSA is an example of an asymmetric algorithm. The combination of these two methods is called hybrid cryptography which has the advantage in terms of speed during the encryption process. Each process, which is encryption and decryption, is carried out twice, so that security can be ensured. In the process of forming the key used the RSA method. In the encryption process using public keys that have been generated before when the key is formed. This public key is used in sending data to the recipient of a secret message where this key is used for the data encryption process. The Secret key is kept and will be used during the decryption process. There is a system architecture that describes how clients and servers communicate with each other over the internet using the TCP protocol where the client here is an IoT device and the server is a server. 

scholarly journals PARALLELIZATION OF RSA CRYPTOGRAPHIC ALGORITHM BASED ON CUDA TECHNOLOGIES

2021 ◽  
Vol 82 (2) ◽  
pp. 5-9
Author(s):  
Lesia Mochurad ◽  
◽  
Yurii Kryvenchuk ◽  
Svyatoslav Yatsyshyn ◽  
◽  
...  
Keyword(s):  
Numerical Experiments ◽  
Public Key ◽  
The Public ◽  
Average Value ◽  
Advantages And Disadvantages ◽  
Parallel Implementations ◽  
Cryptographic Algorithm ◽  
Cuda Technology ◽  
Encryption And Decryption ◽  
Sequential Implementation

The paper examines the efficiency of the application of CUDA technologies for the parallelization of the cryptographic algorithm with the public key. The speed of execution of several implementations of the algorithm is compared: sequential implementation on the CPU and two parallel implementations – on the CPU and GPU. A description of the public key algorithm is presented, as well as properties that allow it to be parallelized. The advantages and disadvantages of parallel implementations are analyzed. It is shown that each of them can be suitable for different scenarios. The software was developed and several numerical experiments were performed. The reliability of the obtained results of encryption and decryption is confirmed. To eliminate the influence of external factors at the time of execution the algorithm was tested ten times in a row and the average value was calculated. Acceleration coefficients for message encryption and decryption algorithms were estimated based on OpenMP and CUDA technology. The proposed approach focuses on the possibility of further optimization through the prospects of developing a multi-core architecture of computer systems and graphic processors.

scholarly journals ENKRIPSI DATA MENGGUNAKAN ADVANCED ENCRYPTION STANDART 256

Kilat ◽  
2018 ◽  
Vol 7 (2) ◽  
pp. 91-99
Author(s):  
Yudi Wiharto ◽  
Ari Irawan
Keyword(s):  
Data Security ◽  
Computer Network ◽  
Public Key ◽  
Network Access ◽  
Important Data ◽  
Public And Private ◽  
The Public ◽  
Private Key ◽  
Aes Algorithm ◽  
Encryption And Decryption

Cryptography is important in securing data and information. Confidential, important information may not be publicly or otherwise protected. It is not impossible for anyone to see, damage, steal or misuse important data from an agency or company through a computer network. The solution is with cryptography or a method of data security that can maintain the confidentiality and authenticity of a data or information. This method is intended for confidential information when sent through network access, such as LAN or internet, cannot be utilized by unauthorized parties. Cryptography supports the aspect of information security, namely protection of confidentiality. Therefore the need to maintain the confidentiality of data and information is a cryptographic application. The process in the form of encryption and decryption used by the user to secure the data without changing the contents of the data. This application has a 32-character key but in its use is made into 2 keys, namely public and private key where the public key is the key filled by the user in accordance with the desire, while the private key is the default key entered by the application at random to meet the length of 32 characters. The AES algorithm used is the AES256 algorithm where this algorithm uses the principle with the number of rounds by key.

scholarly journals Secure Transmission of Data through Electronic Devices using ECC Algorithm

2019 ◽  
pp. 130-135
Author(s):  
G. Banu Priya ◽  
K. Dharani
Keyword(s):  
Electronic Devices ◽  
Public Key ◽  
The Public ◽  
Cryptographic Algorithm ◽  
Private Data ◽  
Encryption And Decryption ◽  
Cryptographic Algorithms ◽  
Cryptographic Keys ◽  
Symmetric Key ◽  
Secure Transmission

In recent days securing the data while transferring through electronic devices from one end to the other has became a challenging task to both sender and the receiver. During the transmission of private data over the electronic devices may be hacked some times by the hackers. The data can be secured by using the cryptographic concept. This paper is about how the data are protected while transferring the data from one electronics devices to another using the ECC algorithm. Cryptographic algorithms plays an important role in securing the data against malicious attacks. The main goal of cryptography is not only to secure data from being hacked or attacked also it can be used for authentication of users. There are two types of cryptographic algorithms namely Symmetric key cryptographic algorithms and Asymmetric key cryptographic algorithms. Symmetric key cryptographic algorithm uses the only one key for both encryption and decryption process, where as Asymmetric cryptographic algorithm uses two different keys for encrypting and decrypting the messages. The public key is made publicly available and can be used to encrypt messages. The private key is kept secret and can be used to decrypt the received messages. Nowadays, many electronic devices like electronic phones, tablets, personal computers are in the workplace for transferring the data. Elliptical curve cryptography (ECC) is a public key encryption technique based on elliptic curve theory that can be used to create privacy, integrity and confidentiality, faster, smaller, and more efficient cryptographic keys.

A Novel IBE Based Authentication Scheme for Network Storage

2012 ◽  
Vol 452-453 ◽  
pp. 791-795 ◽  
Author(s):  
Ya Kun Zhang ◽  
Jia Yin Tian ◽  
Cheng Yang ◽  
Yi Chun Zhang ◽  
Fang Tian Hou
Keyword(s):  
Data Encryption ◽  
Authentication Scheme ◽  
Public Key ◽  
Network Storage ◽  
The Public ◽  
Digital Certificates ◽  
Encryption And Decryption ◽  
Identity Based ◽  
Authentication Schemes ◽  
And Storage

Public Key Infrastructure (PKI) based or Identity-based Encryption (IBE) based authentication schemes are introduced into network storage systems recently. However, the schemes have unavoidable disadvantages:(1)the exchange of digital certificates are complicated.(2)the public key is long.(3)the transmission of private key is vulnerable. In this paper, we design a network storage authentication scheme using Double-PKG. The theoretical and experimental results show that it can ensure the confidentiality, integrity, availability and non-repudiation during data transmission and storage. Our scheme uses the double authentication infrastructure. And it can effectively protect the key transmission. The data encryption and decryption in experiments are relatively stable, so the overall scheme efficiency has been greatly improved.

scholarly journals Combination of MD5 and ElGamal in Verifying File Authenticity and Improving Data Security

2018 ◽  
Author(s):  
Andysah Putera Utama Siahaan
Keyword(s):  
Digital Signature ◽  
Data Security ◽  
Maximum Size ◽  
Public Key ◽  
Web Based ◽  
The Public ◽  
Fast Processing ◽  
Language Data ◽  
Message Digest ◽  
High Level

This study aims to maintain the authenticity of the data to assure the recipient that the data is free from modifications made by other parties, and if there is a modification to the data, then the recipient will know that the data is no longer maintained authenticity. The digital signature technique is used by using a combination of the MD5 algorithm as a hash function algorithm to generate the message digest, and ElGamal algorithm as a public key algorithm, with the combination of the two algorithms, will be generated the digital signature of each data that will be preserved. The ElGamal algorithm is used to encrypt message digest from the process of the MD5 algorithm to files where the digital signature is the result of encryption of message digest. The private key is used for the encryption process, while the public key is used to process the digital signature description when the file testing process is received. The results of the combination of the two algorithms are implemented in a web-based application that is built using the PHP programming language. Data used as input can be in the form of files of any format that has a maximum size of 100 MB. The results showed that a combination of the two algorithms provides digital signatures that have a high level of security and with reasonably fast processing time.

Implementasi Metode Unsupervised Learning Pada Sistem Keamanan Dengan Optimalisasi Penyimpanan Kamera IP

2021 ◽  
Vol 5 (6) ◽  
pp. 1099-1105
Author(s):  
Desta Yolanda ◽  
Mohammad Hafiz Hersyah ◽  
Eno Marozi
Keyword(s):  
Unsupervised Learning ◽  
Night Vision ◽  
Raspberry Pi ◽  
Monitoring Systems ◽  
Test Results ◽  
Storage Process ◽  
File Size ◽  
Web Based ◽  
Security Monitoring ◽  
Human Faces

Security monitoring systems using face recognition can be applied to CCTV or IP cameras. This is intended to improve the security system and make it easier for users to track criminals is theft. The experiment was carried out by detecting human faces for 24 hours using different cameras, namely an HD camera that was active during the day and a Night Vision camera that was active at night. The application of Unsupervised Learning method with the concept of an image cluster, aims to distinguish the faces of known or unknown people according to the dataset built in the Raspberry Pi 4. The user interface media of this system is a web-based application built with Python Flask and Python MySQL. This application can be accessed using the domain provided by the IP Forwarding device which can be accessed anywhere. According to the test results on optimization of storage, the system is able to save files only when a face is detected with an average file size of ± 2.28 MB for 1x24 hours of streaming. So that this storage process becomes more efficient and economical compared to the storage process for CCTV or IP cameras in general.

scholarly journals Survey on Asymmetric Key Cryptographic Algorithms

2020 ◽  
pp. 404-408
Author(s):  
Sabitha S ◽  
Binitha V Nair
Keyword(s):  
Public Key Cryptography ◽  
Public Key ◽  
The Public ◽  
Private Key ◽  
Design And Implementation ◽  
Diffie Hellman ◽  
Encryption And Decryption ◽  
Cryptographic Algorithms ◽  
Symmetric Key ◽  
Symmetric Key Cryptography

Cryptography is an essential and effective method for securing information’s and data. Several symmetric and asymmetric key cryptographic algorithms are used for securing the data. Symmetric key cryptography uses the same key for both encryption and decryption. Asymmetric Key Cryptography also known as public key cryptography uses two different keys – a public key and a private key. The public key is used for encryption and the private key is used for decryption. In this paper, certain asymmetric key algorithms such as RSA, Rabin, Diffie-Hellman, ElGamal and Elliptical curve cryptosystem, their security aspects and the processes involved in design and implementation of these algorithms are examined.

scholarly journals A New Symmetric Key Cryptographic Algorithm using Paley Graphs and ASCII Values

2021 ◽  
Vol 297 ◽  
pp. 01046
Author(s):  
Zhour Oumazouz ◽  
Driss Karim
Keyword(s):  
Brute Force ◽  
Strong Regularity ◽  
Quadratic Residues ◽  
Cryptographic Algorithm ◽  
Paley Graph ◽  
Encryption And Decryption ◽  
Symmetric Key ◽  
Brute Force Attack ◽  
The Moment ◽  
Paley Graphs

The main objective of the study conducted in this article is to introduce a new algorithm of encryption and decryption of a sensitive message after transforming it into a binary message. Our proposed encryption algorithm is based on the study of a particular graph constructed algebraically from the quadratic residues. We have exploited the Paley graph to introduce an abstract way of encryption of such message bit according to the other message bits by the intermidiate study of the neighborhood of a graph vertex. The strong regularity of the Paley graphs and the unknown behavior of the quadratic residues will play a very important role in the cryptanalysis part which allows to say that the brute force attack remains for the moment the only way to obtain the set of possible messages.

Implementasi Algoritma Merkle-Hellman Knapsack dalam Penyandian Record Database

2020 ◽  
pp. 162-165
Author(s):  
Reni Rahmadani ◽  
Harvei Desmon Hutahaean ◽  
Ressy Dwitias Sari
Keyword(s):  
Data Security ◽  
Public Key Cryptography ◽  
Data Encryption ◽  
Key Generation ◽  
Software Developers ◽  
Data Owner ◽  
Encryption And Decryption ◽  
User Data ◽  
Np Complete ◽  
Knapsack Algorithm

A lot of data is misused without the data owner being aware of it. Software developers must ensure the security user data on their system. Due to the size of the market that houses data, the security of record databases must be of great concern. Cryptographic systems or data encryption can be used for data security. The Merkle-Hellman Knapsack algorithm is included in public-key cryptography because it uses different keys for the encryption and decryption processes. This algorithm belongs to the NP-complete algorithm which cannot be solved in polynomial order time. This algorithm has stages of key generation, encryption, and decryption. The results of this study secure database records from theft by storing records in the form of ciphertext/password. Ciphertext generated by algorithmic encryption has a larger size than plaintext.

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