Login Security Using One Time Password (OTP) Application with Encryption Algorithm Performance

Abstract

During the Covid-19 pandemic, almost all jobs and activities to be limited, relying on the internet network. Data security in an internet network is most important and needs to be a concern for internet users. The internet network is a public network, which is vulnerable to security attacks. Attacks may occur to retrieve user data in the form of a username and password. This study conducts system design to improve the security of the username and password data when logging into web applications. Login using One-Time Password (OTP) verification by implementing the AES algorithm and Blowfish to encrypt the verification code. The verification code uses an SMS gateway. Testing is done by looking at security performances and comparing the performance of the Blowfish and AES algorithm. The results of the design research show that OTP is running well where the AES algorithm performance has advantages in terms of encryption and decryption speed compared to the Blowfish algorithm with a difference of ± 0.015 milliseconds for encryption and ± 0.04 milliseconds for decryption.