Recommendation ITU-T X.1156 provides a non-repudiation framework based on a one-time password (OTP) to provide trust mechanisms between transaction entities. Also, this Recommendation describes the security requirements of a one-time password based on a non-repudiation service, as well as the mechanisms for generating non-repudiation tokens.
ITU-T X.1156-2013 Referenced Document
ITU-T X.1153-2011 Management framework of a one time password-based authentication service (Study Group 17)
ITU-T X.813-1996 Information Technology - Open Systems Interconnection - Security Frameworks in Open Systems: Non-Repudiation Framework - Series X: Data Networks and Open System Communication Security
ITU-T X.1156-2013 history
2013ITU-T X.1156-2013 Non-repudiation framework based on a one-time password (Study Group 17)