%% You should probably cite rfc6113 instead of this I-D. @techreport{ietf-krb-wg-preauth-framework-17, number = {draft-ietf-krb-wg-preauth-framework-17}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-krb-wg-preauth-framework/17/}, author = {Sam Hartman and Larry Zhu}, title = {{A Generalized Framework for Kerberos Pre-Authentication}}, pagetotal = 48, year = 2010, month = jun, day = 22, abstract = {Kerberos is a protocol for verifying the identity of principals (e.g., a workstation user or a network server) on an open network. The Kerberos protocol provides a facility called pre-authentication. Pre-authentication mechanisms can use this facility to extend the Kerberos protocol and prove the identity of a principal. This document describes a more formal model for this facility. The model describes what state in the Kerberos request a pre-authentication mechanism is likely to change. It also describes how multiple pre-authentication mechanisms used in the same request will interact. This document also provides common tools needed by multiple pre-authentication mechanisms. One of these tools is a secure channel between the client and the key distribution center with a reply key strengthening mechanism; this secure channel can be used to protect the authentication exchange and thus eliminate offline dictionary attacks. With these tools, it is relatively straightforward to chain multiple authentication mechanisms, utilize a different key management system, or support a new key agreement algorithm. {[}STANDARDS-TRACK{]}}, }