In-depth guides, tips, and tutorials on two-factor authentication and online security.
A practical guide to adding two-factor authentication to any web application, covering UX design, security architecture, edge cases, and everything between first login and account recovery.
Read more →Basic Auth is the simplest HTTP authentication scheme a username and password encoded in Base64. Learn how it works, its security limitations, and when it's appropriate to use.
Read more →URL encoding converts special characters into a format safe for use in web addresses. Learn what it is, how percent-encoding works, and when you need to use it.
Read more →Base32 converts binary data into a set of 32 safe characters. It's why your 2FA secret looks like JBSWY3DPEHPK3PXP. Learn how it works and when to use it vs Base64.
Read more →MD5 and SHA-256 are both hash functions, but they're not interchangeable. Learn the key differences, when each is appropriate, and why MD5 should never be used for security.
Read more →A developer's complete guide to adding TOTP 2FA to any web application. Covers secret generation, QR code setup, code verification, and backup codes with code examples.
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