| Subject | English | Korean |
| comp., MS | authentication challenge | 인증 질문 (A dialog that requires the user to provide a response in order to authenticate to ILM "2") |
| comp., MS | authentication challenge activity | 인증 질문 활동 (A Windows Workflow Foundation activity that is used to configure a challenge that will be issued to a user in order to authenticate to ILM "2") |
| comp., MS | Challenge Handshake Authentication Protocol | Challenge Handshake 인증 프로토콜 (A challenge-response authentication protocol for Point-to-Point Protocol (PPP) connections described in RFC 1994. It uses the industry-standard MD5 hashing algorithm to hash the combination of a challenge string issued by the authenticating server and the user's password in the response) |