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    "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]",
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    "authors": [
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        "name": "Sam Hartman"
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      {
        "name": "Larry Zhu"
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    "docTitle": "A Generalized Framework for Kerberos Pre-Authentication",
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      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
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      "source": "parsed",
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      "confidence": "high",
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        "orphan/RFC6113/h:6d24642b",
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        "orphan/RFC6113/h:8d8c99f9",
        "orphan/RFC6113/h:d0a16ac5",
        "orphan/RFC6113/h:bb52de6c",
        "orphan/RFC6113/h:c46cc730",
        "orphan/RFC6113/h:97332a68",
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        "confidence": "high",
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        "confidence": "high",
        "note": "Parsed from RFC index XML",
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        "source": "parsed",
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        "confidence": "high",
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        "source": "parsed",
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
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        "source": "resolved",
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