One-way authentication is based on-
One-way authentication is based on
1) Possession of a secret (password)
2) Possession of an artifact
3) Unique physiological or behavioral characteristics of the user.
Authentication is the act of confirming the truth of an attribute of a single piece of data claimed true by an entity. With identification, which refers to the act of stating or otherwise indicating a claim purportedly attesting to a person or thing's identity, authentication is the process of actually confirming that identity.