| Table of Contents - X.1280 (03/2024) - Framework for out-of-band server authentication using mobile devices1	Scope2	References
 3	Definitions
 3.1	Terms defined elsewhere
 3.2	Terms defined in this Recommendation
 4	Abbreviations and acronyms
 5	Conventions
 6	Introduction
 7	Framework for out-of-band server authentication
 7.1	Roles and components
 7.2	Server authentication information
 7.3	Authentication model
 8	Procedures for out-of-band server authentication
 8.1	Out-of-band server authenticator installation and registration
 8.2	Server authentication request
 8.3	Server authentication information generation and presentation
 8.4	Server authentication
 8.5	User authentication and service provision
 9	Security threats and security requirements
 9.1	Security threats
 9.2	Security requirements
 Annex A – Extra procedure for out-of-band server authentication
 A.1	User password automatic renewal
 Appendix I – Relationship between security requirements and threats
 Appendix II – Use cases of out-of-band server authentication model
 II.1	Websites and applications
 II.2	IdPs
 II.3	Operating systems
 Appendix III – Relationship to other authentication technologies
 Bibliography
 
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