| Subject | English | Czech |
| comp., MS | authentication challenge | výzva ověřování (A dialog that requires the user to provide a response in order to authenticate to ILM "2") |
| comp., MS | authentication challenge activity | aktivita výzvy ověřování (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 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 | protokol CHAP (Challenge Handshake Authentication Protocol) |
| comp., MS | HIP challenge | výzva k ručnímu zadání kontrolního kódu, alfanumerický ověřovací kód (A challenge meant to be easily solved by humans, while remaining too hard to be economically solved by computers) |
| industr. | industrial challenge | průmyslový úkol |
| comp., MS | payment instrument challenge | kontrola platebního nástroje (A fraud prevention mechanism that attempts to verify that an individual using a payment instrument is authorized to use or is the owner of that instrument) |