noun
user certificate; certificate
A digital certificate used to authenticate a user in computing contexts. Often abbreviated or referred to in technical documentation.
システムにログインするには、利用者証明証が必要です。
A user certificate is required to log into the system.
利用者証明証の有効期限が切れています。
The user certificate has expired.
Compound of 利用者 (user) + 証明 (proof, certification) + 証 (certificate). The exact derivation is uncertain; it is a technical term likely coined in computing contexts.