Web-based live chat application uses advanced encryption standard methods and rivest shamir adleman

Abstract

The development of technology, especially in the data security system in maintaining the security of information data has been growing rapidly. In maintaining the security of information data there are branches of science in its development such as cryptography and steganography. In its application is not only done on one security technique, but can be done in combination with information security data. This study aims to create a data security system by implementing cryptography on messages in the live chat application. The message security in live chat applies a combination of AES and RSA algorithms. The AES (Advanced Encryption Standard) method is a cryptographic algorithm that can be used to secure data, the AES algorithm is a symmetric chipertext block that can encrypt and decrypt information, and the RSA Method is the RSA Algorithm is a block cipher algorithm (an algorithm that works per block of data) that groups plaintext into blocks first before being encrypted to become ciphertext. This application aims to secure messages sent by the sender to stay safe when received by the recipient. The system will be based on a website using the PHP programming language, using a codeigniter framework and a MySQL database. This information system is in the form of live chat which will be encrypted by 2 methods. The sender will send a message through the live chat website then the message is encrypted so that its security is guaranteed, the message stored in the database will be automatically encrypted by the two methods applied then after arriving at the recipient the message is automatically described. The message sent is in the form of text and png files.