My minimal, open-source implementations in a couple of languages: https://www.nayuki.io/page/time-based-one-time-password-tools https://www.nayuki.io/page/time-

My minimal, open-source implementations in a couple of languages: https://www.nayuki.io/page/time-based-one-time-password-tools https://www.nayuki.io/page/time-based-one-time-password-tool... The shortest one I have is a 6-line Python function using only the standard library. I noticed that all the major tech companies support TOTP 2FA - e.g. Google, Amazon, Uber, Dropbox, etc. At the same time, I am very annoyed that seemingly none of the Canadian banks or CRA support it. They either use SMS/PSTN or a proprietary mobile-only application (no desktop version). Is the industry standard not good enough for ya?