認証は英語で
certificate

英語の定義

認証
1. n. certification - act or process of certifying
2. n. certificate - document containing a certified statement
3. n. (computing) recognition
4. v. to certify, to certificate
5. v. (computing) to recognise

certificate
1. n. A document containing a certified statement.
2. n. A document evidencing ownership or debt.
3. n. A document serving as evidence as a person has completed an educational course, issued either by an institution not authorised to grant diplomas, or to a student not qualifying for a diploma.
4. n. (computing theory) The information needed in order to verify a positive answer to a problem.
5. v. To supply with a certificate, especially following certification

authentication
1. n. something which validates or confirms the authenticity of something
2. n. (computing) proof of the identity of a user logging on to some network
3. n. a hallmark or assay-mark on a piece of metalwork