Under OTP, I showed with example how to generate an totp. By default the length of the totp generated will be 6. We can change that to any number between 6 and 8. In this post under OTP, I will show with example how to change totp length to 8. Below is the complete main…… Continue reading Changing the totp length

In this post, I will show with example how to verify TOTP. In my previous posts, under OTP I showed with example how to generate TOTP. To verify an TOTP we can use non-static overloaded “verify” methods in “TOTP” class. Below is the complete code for your reference. Main Class 1 package defaultPackage;2 3 import…… Continue reading Verifying the TOTP

In previous post, I showed with example how to generate an TOTP. I also mentioned in my previous post, how the framework by default using SHA-1 algorithm to generate the totp. In this post under OTP, I will show with example how to change the default algorithm. Below is the code for your reference. 1…… Continue reading Changing the algorithm when generating totp

In this post I will show with example how to generate TOTP. TOTP is based on HOTP but instead of using counter, TOTP uses the current time as the counter in addition to secret key So TOTP = HOTP(secret key, current time). Similar to HOTP in client server scenario both client and server has to…… Continue reading Generating an TOTP