Authentication is a mechanism that verifies whether an entity is who it claims to be. On a Linux system, applications, such as su, passwd or login, are used to authenticate users before they are given ...

Two-factor authentication aims to solve the decades-old problem of password-based attacks, such as brute-force attacks and key-logging attacks. In Linux, two-factor authentication can be accomplished ...

Security researchers have discovered an unusually evasive Linux backdoor, undetected even by VirusTotal, compromising systems as a malicious pluggable authentication module (PAM). Dubbed “Plague” by ...