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#authentication

User authentication mechanisms

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Multi-Tab Session Sync in a PKCE SPA with `okta-auth-js`

Multi-Tab Session Sync in a PKCE SPA with `okta-auth-js`

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3 min read
MFA Isn’t Enough: Defense in Depth for Modern Applications

MFA Isn’t Enough: Defense in Depth for Modern Applications

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3 min read
Email-Domain Admission: Verified Company Signup Without Unsafe Auto-Join Decisions

Email-Domain Admission: Verified Company Signup Without Unsafe Auto-Join Decisions

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8 min read
Beginner OTP Login Architecture Through Code-Owned SMS and Email Templates

Beginner OTP Login Architecture Through Code-Owned SMS and Email Templates

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6 min read
SMS OTP Login Backend: Send, Verify, Rate Limit, and Retry

SMS OTP Login Backend: Send, Verify, Rate Limit, and Retry

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7 min read
Authentication vs Authorization: Who Are You, and What Are You Allowed to Do?

Authentication vs Authorization: Who Are You, and What Are You Allowed to Do?

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2 min read
6 Production Rules to Delete User Accounts and Revoke Sessions Safely

6 Production Rules to Delete User Accounts and Revoke Sessions Safely

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8 min read
Two-Factor Authentication: How to Observe SMS and Trigger Backup Email

Two-Factor Authentication: How to Observe SMS and Trigger Backup Email

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7 min read
Compliance Evidence for SMS OTP Login Polling Status When Provider Webhooks Are Missing

Compliance Evidence for SMS OTP Login Polling Status When Provider Webhooks Are Missing

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6 min read
Verify CAPTCHA Tokens Before Creating Users (Express Middleware Runbook)

Verify CAPTCHA Tokens Before Creating Users (Express Middleware Runbook)

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7 min read
Application-Owned Two Factor Authentication Beats Provider SMS Backup Email in 2026

Application-Owned Two Factor Authentication Beats Provider SMS Backup Email in 2026

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7 min read
Authentication in Node.js Applications: JWT, Password Hashing and Secure APIs

Authentication in Node.js Applications: JWT, Password Hashing and Secure APIs

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4 min read
5 Observable SMS and Email OTP Practices (For Reliable SaaS Login)

5 Observable SMS and Email OTP Practices (For Reliable SaaS Login)

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6 min read
Passkey enrollment security in practice

Passkey enrollment security in practice

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3 min read
Building Secure Communication Systems: Key Concepts Developers Should Know

Building Secure Communication Systems: Key Concepts Developers Should Know

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4 min read
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