ITU-T X.1159 PDF

This Recommendation provides an enhanced non-repudiation model based on [ITU-T X.813] in support of application services. The user can authenticate and generate non-repudiation evidence for the transaction of data by a trusted third party (TTP), which is the central signing authority. The recommended architecture provides an integration of the authentication token to access the central signing authority. The architecture also integrates multiple service providers to provide a nonrepudiation service for a single authenticated device. The model will provide non-repudiation services for any type of device including the mobile device. Although this architecture requires the use of strong authentication, this is out of the scope of this Recommendation. Furthermore, issuing and managing a signing key are out of the scope of this Recommendation.