In a context where strong authentication is increasingly needed, many services have started to block logins made by old applications or that do not support modern methods such as MFA (multifactor authentication) or OAuth.
To solve this challenge without compromising security, application passwords appear.
What is an Application Password?
It is an automatically generated credentials — usually composed of random characters — used exclusively to allow legacy applications or services that do not support modern authentication to access an account securely.
Unlike the main user password, the application password cannot be used for direct login to the web portal and, when compromised, can be revoked without affecting other sessions or credentials.
It functions as a “secondary and isolated key” created only for that specific service.
Why does she exist?
Modern services like Google, Microsoft or corporate providers require advanced authentication standards.
Old apps (such as outdated email clients, scanners, legacy systems and automated integrations) cannot handle MFA or more robust protocols.
The application password allows these systems to continue operating without requiring the actual user password.
How it works in practice
• Active MFA user or secure access policies in the account.
• The service starts to refuse apps logins that do not support the new default.
• The user generates a unique application password for that system.
• The app uses this alternative password to authenticate and operate normally.
Practical example
You update the security of your corporate account by enabling MFA.
Your network scanner that sends PDFs by email does not support MFA.
You then create an application password in your account panel and use that password only in the scanner.
If necessary, you can revoke this password at any time without changing your main password.
Benefits for customers and partners
Insulation of credentials — each password is exclusive to an app or integration.
Quick revocation in case of compromise.
Allows MFA adoption without interrupting critical operations.
Why This Is Relevant
The application password strengthens the identity protection model by limiting the impact of exposed credentials and allowing organizations to evolve their authentication policies without breaking old operational flows.
It is a practical solution, widely adopted and that maintains the balance between security and continuity.
