Description: Pluggable Authentication Modules (PAM) are a framework for managing authentication on Unix-based systems. This system allows system administrators to configure and manage user authentication flexibly and modularly. PAM provides a unified interface for different authentication methods, such as passwords, smart cards, biometric authentication, and more. Its modular design allows authentication methods to be added or removed without modifying the applications that use PAM. This means administrators can customize the security of their systems according to their specific needs, choosing which modules to activate and in what order they should execute. Additionally, PAM is widely used in various Unix-based distributions, making it an essential tool for security management in these environments. Its ability to integrate with other authentication systems and its flexibility have made it a standard in the administration of security for Unix-based operating systems.
History: PAM was developed in 1995 by a group of engineers at Sun Microsystems as part of an effort to improve security in Unix systems. Since its inception, PAM has evolved and become a standard in most Unix-based distributions, allowing for more flexible and secure authentication management.
Uses: PAM is primarily used to manage user authentication on Unix-based systems, allowing the integration of multiple authentication methods. This includes password-based authentication, two-factor authentication, and biometric methods, among others.
Examples: A practical example of PAM is its use in configuring two-factor authentication on Unix-based systems, where a password module can be combined with a time-based authentication module, such as Google Authenticator.
