How to say "authentication" in Japanese

• 認証にんしょうCommon
  noun, suru verb, transitive verbIt covers authentication in the broad sense: confirming that someone or something is genuine or legitimate. This is the common word in technical contexts, such as verifying a user's identity before granting access.
  管理人かんりにんによってアカウントの認証にんしょうが行おこなわれたあと、あなたに確認かくにんのメールが送おくられます。↗

  You will receive a confirmation email after your account has been activated by an administrator.
• 公証こうしょう
  nounA narrower, less common term: authentication in the legal sense of notarization, where a notary certifies a document. For verifying identity or access it is seldom the word you want; use 認証.

Choose 認証, the common word, for authentication in the general sense of verifying identity or genuineness; reserve 公証 for the narrower legal sense of authenticating documents by notarization.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 認証にんしょうcertification
• 公証こうしょうauthentication
• データ確認データかくにん(data) authentication