Definition[]
Challenge response is
| “ | a method used to confirm the presence of a person by eliciting direct responses from the individual. Responses can be either voluntary or involuntary. In a voluntary response, the end user will consciously react to something that the system presents. In an involuntary response, the end user's body automatically responds to a stimulus. A challenge response can be used to protect the system against attacks.[1] | ” |
References[]
- ↑ NSTC Subcommittee on Biometrics, Biometrics Glossary, at 6 (Sept. 14, 2006) (full-text).