critic someone who frequently finds fault or makes harsh and unfair judgments
artistic creation,
artistic production,
art the creation of beautiful or significant things; "art does not need to be innovative to be good"; "I was never any good at art"; "he said that architecture is the art of wasting space beautifully"
authenticator -
A feature that shows something to be authentic.
Wikipedia
An authenticator is either a token of authentication or one who authenticates. As a token, the authenticator can be a symbol or group of symbols, or a series of bits, selected or derived in a prearranged manner and usually inserted at a predetermined point within a message or transmission.
