TOTP Base32 Secret Key Limit?

Nitrokeys
1

When configuring my Nitrokey to work with my accounts that use 2FA (TOTP), I ran into an issue. It seems that the Base32 secret key issued by some of the services was too long for Nitrokey. When I would enter the key, Nitrokey would truncate the key. Is there a way around this - or a future update that will allow a longer limit?

2

This is a known issue for Amazon Web Services which uses longer OTP secrets than most other services. The constrain is the limited amount of memory in the hardware which is why the length is limited. There is no workaround available. We might change the memory layout in the future to enable longer OTP secrets but no specific plan yet.