Abstract
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.
Highlights
Data security and confidentiality are one of the most important aspects of information systems today
The security level of the Rivest Shamir Adleman (RSA) encryption algorithm depends heavily on the key size of the password, because the smaller the key size, the greater the possible combination of locks can be broken by the method of examining the combination of one by one key or better known as Brute Force Attack
In this study developed a data security system by implementing the cryptography algorithm Rivest Shamir Adleman (RSA) and Vigenere Chiper
Summary
Data security and confidentiality are one of the most important aspects of information systems today. One attempt to secure data such as by using cryptography. Cryptography is the art or science used to maintain the security of information or messages by turning it into something that has no meaning. Various kinds of cryptographic algorithms can be implemented to realize the data security system. Among them is Rivest Shamir Adleman (RSA) cryptography algorithm. The security level of the RSA encryption algorithm depends heavily on the key size of the password, because the smaller the key size, the greater the possible combination of locks can be broken by the method of examining the combination of one by one key or better known as Brute Force Attack. The prime numbers generated in the RSA algorithm affect the key size of the password [2]
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