Where does “autentificare” come from?

autentificare (Romanian) comes from Romanian autentifica, from French authentifier, from French authentique, from Latin authenticus, from Ancient Greek αὐθεντικός, from Ancient Greek αὐθέντης, from Ancient Greek αὐτο-, from Ancient Greek αὐτός — Postpositional intensifying particle: indeed, at any rate, in fact.

autentificare (Romanian): authentication, login

Definitions

authentication, login

Ancestry of “autentificare”, step by step

Step	Language	Word	Meaning
1	Romanian	autentifica	to authenticate
2	French	authentifier	to authenticate
3	French	authentique	authentic, real, genuine; first-person singular...
4	Latin	authenticus	original, genuine, authentic
5	Ancient Greek	αὐθεντικός	warranted, authentic, authoritative
6	Ancient Greek	αὐθέντης	a perpetrator of any act, especially that he...
7	Ancient Greek	αὐτο-	self-
8	Ancient Greek	αὐτός	αὐτή f, αὐτό n; "first/second declension";...
9	Proto-Indo-European	h₂ew	away from, off; again
10	Proto-Indo-European	ǵʰe	Postpositional intensifying particle: indeed, at any rate, in fact

Every word from Proto-Indo-European ǵʰe →Every word from Proto-Indo-European h₂ew →Every word from Ancient Greek αὐτός →