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

Industry

Comprehensive Guide to Cryptographic Failures (OWASP Top 10 A02)

Learn what cryptographic failures are, see real-world examples, and get OWASP best practices to secure data in transit & at rest.

Fung
May 28, 2025
Engineering

OTP Bypass: How OTP Bots Beat SMS 2FA (+ Fixes)

See how OTP bot apps bypass SMS 2FA and ship fixes fast: adaptive CAPTCHA, entity rate limits, risk scoring, and Authgear fraud protection.

Fung
May 28, 2025
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

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