authentication

As an abbreviation sys

is system.

As a noun authentication is

something which validates or confirms the authenticity of something.

As nouns the difference between authentication and acknowledgement

is that authentication is something which validates or confirms the authenticity of something while acknowledgement is (british) the act of acknowledging; admission; avowal; owning; confession.

As nouns the difference between authentication and approval

is that authentication is something which validates or confirms the authenticity of something while approval is an expression granting permission; an indication of agreement with a proposal; an acknowledgement that a person, thing or event meets requirements.

In computing|lang=en terms the difference between permission and authentication

is that permission is (computing) flags or access control lists pertaining to a file that dictate who can access it, and how while authentication is (computing) proof of the identity of a user logging on to some network.

As nouns the difference between permission and authentication

is that permission is authorisation; consent (especially formal consent from someone in authority) while authentication is something which validates or confirms the authenticity of something.

As nouns the difference between ui and authentication

is that ui is (lb) while authentication is something which validates or confirms the authenticity of something.

As a noun authentication

is something which validates or confirms the authenticity of something.

As an adjective undefined is

lacking a definition or value.

As a verb verify

is to substantiate or prove the truth of something.

As a noun authentication is

something which validates or confirms the authenticity of something.

Credential is a related term of authentication.

As nouns the difference between credential and authentication

is that credential is documentary evidence that a person has certain status or privileges while authentication is something which validates or confirms the authenticity of something.

As an adjective credential

is of, pertaining to or entitling to credit or authority.

As a verb credential

is to furnish with.

As a noun authentication

is something which validates or confirms the authenticity of something.

As a verb examine is

.

As nouns the difference between authentication and null

is that authentication is something which validates or confirms the authenticity of something while null is zero, nil; the cardinal number before einn.