Any organization can have a successful implementation of its security policy only if accountability is well maintained. Maintaining accountability can help in holding subjects accountable for all their actions. Any given system can be said to be effective in accountability based on its ability to track and prove a subject's identity.
Various mechanisms, such as auditing, authentication, authorization, and identification, help associate humans with the activities they perform.
Using a password as the only form of authentication creates a significant room for doubt and compromise. There are numerous easy ways of compromising passwords and that is why they are considered the least secure form of authentication. When multiple factors of authentication, such as a password, smart card, and fingerprint scan, are used in conjunction with one another, the possibility of identity theft or compromise reduces drastically.