An account password is a confidential string of characters—typically combining letters, numbers, and special symbols—that serves as a primary authentication factor in cybersecurity systems. It functions as a critical security control that verifies a user's identity to authorize or deny access to digital systems, applications, and sensitive data. Within Identity & Access Management (IAM) frameworks, the account password acts as the foundational credential confirming an individual as the legitimate owner of a digital profile or resource.

The fundamental purpose of an account password is to prevent unauthorized access, mitigate data breach risks, and protect sensitive information stored within digital environments. Its effectiveness depends directly on complexity, uniqueness across different accounts, and strict confidentiality maintained by the user. A strong account password forms an essential initial barrier against cyber threats such as brute-force attacks and credential stuffing, making it a cornerstone of digital identity security.