Fung

Product Manager

Having an open relationship with code, design, and marketing

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Having an open relationship with code, design, and marketing

Posts by 

Fung

Engineering

5 Common TOTP Mistakes Developers Make (and How to Fix them)

TOTP codes not working? See 5 common mistakes developers make — clock drift, Base32 secrets, RFC 6238 parameter mismatches — and how to fix them. Includes a free online TOTP Authenticator tool.

Fung
May 28, 2025
Engineering

What is TOTP? A short guide for developers (RFC 6238 explained)

What is TOTP (Time-based One-Time Password)? A concise RFC 6238 explanation for developers with code examples (Node, Python, Go), troubleshooting tips, and a free online TOTP tool.

Fung
May 28, 2025
Engineering

The Complete Guide to Machine-to-Machine (M2M) Authentication — OAuth Client Credentials Flow

Learn how M2M tokens work, implement OAuth 2.0 Client Credentials, host JWKS, rotate keys, and secure service-to-service authentication with examples in curl, Node, Python, and Go.

Fung
May 28, 2025
Industry

Authgear Takes the Passkey Pledge: Our Commitment to a Passwordless Future

Authgear proudly joins the FIDO Alliance's Passkey Pledge, building on our early adoption since 2022. Passkeys eliminate password vulnerabilities while enhancing user experience through biometric verification. We're committed to making passwordless authentication the default, creating a digital ecosystem where security and convenience perfectly coexist.

Fung
May 28, 2025

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