README
                       Kerberos Version 5, Release 1.22
    
                                Release Notes
                            The MIT Kerberos Team
    
    Copyright and Other Notices
    ---------------------------
    
    Copyright (C) 1985-2023 by the Massachusetts Institute of Technology
    and its contributors.  All rights reserved.
    
    Please see the file named NOTICE for additional notices.
    
    Documentation
    -------------
    
    Unified documentation for Kerberos V5 is available in both HTML and
    PDF formats.  The table of contents of the HTML format documentation
    is at doc/html/index.html, and the PDF format documentation is in the
    doc/pdf directory.
    
    Additionally, you may find copies of the HTML format documentation
    online at
    
        https://web.mit.edu/kerberos/krb5-latest/doc/
    
    for the most recent supported release, or at
    
        https://web.mit.edu/kerberos/krb5-devel/doc/
    
    for the release under development.
    
    More information about Kerberos may be found at
    
        https://web.mit.edu/kerberos/
    
    and at the MIT Kerberos Consortium web site
    
        https://kerberos.org/
    
    Building and Installing Kerberos 5
    ----------------------------------
    
    Build documentation is in doc/html/build/index.html or
    doc/pdf/build.pdf.
    
    The installation guide is in doc/html/admin/install.html or
    doc/pdf/install.pdf.
    
    If you are attempting to build under Windows, please see the
    src/windows/README file.
    
    Reporting Bugs
    --------------
    
    Please report any problems/bugs/comments by sending email to
    krb5-bugs@mit.edu.
    
    You may view bug reports by visiting
    
    https://krbdev.mit.edu/rt/
    
    and using the "Guest Login" button.  Please note that the web
    interface to our bug database is read-only for guests, and the primary
    way to interact with our bug database is via email.
    
    PAC transitions
    ---------------
    
    Beginning with release 1.20, the KDC will include minimal PACs in
    tickets instead of AD-SIGNEDPATH authdata.  S4U requests (protocol
    transition and constrained delegation) must now contain valid PACs in
    the incoming tickets.  Beginning with release 1.21, service ticket
    PACs will contain a new KDC checksum buffer, to mitigate a hash
    collision attack against the old KDC checksum.  If only some KDCs in a
    realm have been upgraded across versions 1.20 or 1.21, the upgraded
    KDCs will reject S4U requests containing tickets from non-upgraded
    KDCs and vice versa.
    
    Triple-DES and RC4 transitions
    ------------------------------
    
    Beginning with the krb5-1.21 release, the KDC will not issue tickets
    with triple-DES or RC4 session keys unless explicitly configured using
    the new allow_des3 and allow_rc4 variables in [libdefaults].  To
    facilitate the negotiation of session keys, the KDC will assume that
    all services can handle aes256-sha1 session keys unless the service
    principal has a session_enctypes string attribute.
    
    Beginning with the krb5-1.19 release, a warning will be issued if
    initial credentials are acquired using the des3-cbc-sha1 encryption
    type.  Beginning with the krb5-1.21 release, a warning will also be
    issued for the arcfour-hmac encryption type.  In future releases,
    these encryption types will be disabled by default and eventually
    removed.
    
    Beginning with the krb5-1.18 release, all support for single-DES
    encryption types has been removed.
    
    Major changes in 1.22
    ---------------------
    
    krb5-1.22 changes by ticket ID
    ------------------------------
    
    Acknowledgements
    ----------------
    
    Past Sponsors of the MIT Kerberos Consortium:
    
        Apple
        Carnegie Mellon University
        Centrify Corporation
        Columbia University
        Cornell University
        The Department of Defense of the United States of America (DoD)
        Fidelity Investments
        Google
        Iowa State University
        MIT
        Michigan State University
        Microsoft
        MITRE Corporation
        Morgan-Stanley
        The National Aeronautics and Space Administration
            of the United States of America (NASA)
        Network Appliance (NetApp)
        Nippon Telephone and Telegraph (NTT)
        US Government Office of the National Coordinator for Health
            Information Technology (ONC)
        Oracle
        Pennsylvania State University
        Red Hat
        Stanford University
        TeamF1, Inc.
        The University of Alaska
        The University of Michigan
        The University of Pennsylvania
    
    Past and present members of the Kerberos Team at MIT:
    
        Danilo Almeida
        Jeffrey Altman
        Justin Anderson
        Richard Basch
        Mitch Berger
        Jay Berkenbilt
        Andrew Boardman
        Bill Bryant
        Steve Buckley
        Joe Calzaretta
        John Carr
        Mark Colan
        Don Davis
        Sarah Day
        Alexandra Ellwood
        Carlos Garay
        Dan Geer
        Nancy Gilman
        Matt Hancher
        Thomas Hardjono
        Sam Hartman
        Paul Hill
        Marc Horowitz
        Eva Jacobus
        Miroslav Jurisic
        Barry Jaspan
        Benjamin Kaduk
        Geoffrey King
        Kevin Koch
        John Kohl
        HaoQi Li
        Jonathan Lin
        Peter Litwack
        Scott McGuire
        Steve Miller
        Kevin Mitchell
        Cliff Neuman
        Paul Park
        Ezra Peisach
        Chris Provenzano
        Ken Raeburn
        Jon Rochlis
        Jeff Schiller
        Jen Selby
        Robert Silk
        Bill Sommerfeld
        Jennifer Steiner
        Ralph Swick
        Brad Thompson
        Harry Tsai
        Zhanna Tsitkova
        Ted Ts'o
        Marshall Vale
        Taylor Yu
    
    The following external contributors have provided code, patches, bug
    reports, suggestions, and valuable resources:
    
        Ian Abbott
        Daniel Albers
        Brandon Allbery
        Russell Allbery
        Brian Almeida
        Michael B Allen
        Pooja Anil
        Jeffrey Arbuckle
        Heinz-Ado Arnolds
        Derek Atkins
        Mark Bannister
        David Bantz
        Alex Baule
        Nikhil Benesch
        David Benjamin
        Thomas Bernard
        Adam Bernstein
        Arlene Berry
        Jeff Blaine
        Toby Blake
        Radoslav Bodo
        Alexander Bokovoy
        Sumit Bose
        Emmanuel Bouillon
        Isaac Boukris
        Ulf Bremer
        Pavel Březina
        Philip Brown
        Samuel Cabrero
        Michael Calmer
        Andrea Campi
        Julien Chaffraix
        Puran Chand
        Ravi Channavajhala
        Srinivas Cheruku
        Leonardo Chiquitto
        Rachit Chokshi
        Seemant Choudhary
        Howard Chu
        Andrea Cirulli
        Christopher D. Clausen
        Kevin Coffman
        Simon Cooper
        Sylvain Cortes
        Ian Crowther
        Arran Cudbard-Bell
        Adam Dabrowski
        Jeff D'Angelo
        Nalin Dahyabhai
        Mark Davies
        Dennis Davis
        Alex Dehnert
        Misty De Meo
        Mark Deneen
        Günther Deschner
        John Devitofranceschi
        Marc Dionne
        Roland Dowdeswell
        Ken Dreyer
        Dorian Ducournau
        Viktor Dukhovni
        Jason Edgecombe
        Mark Eichin
        Shawn M. Emery
        Douglas E. Engert
        Peter Eriksson
        Juha Erkkilä
        Gilles Espinasse
        Sergey Fedorov
        Ronni Feldt
        Bill Fellows
        JC Ferguson
        Remi Ferrand
        Paul Fertser
        Fabiano Fidêncio
        Frank Filz
        William Fiveash
        Jacques Florent
        Oliver Freyermuth
        Ákos Frohner
        Sebastian Galiano
        Marcus Granado
        Dylan Gray
        Norm Green
        Scott Grizzard
        Helmut Grohne
        Steve Grubb
        Philip Guenther
        Timo Gurr
        Dominic Hargreaves
        Robbie Harwood
        John Hascall
        Jakob Haufe
        Matthieu Hautreux
        Jochen Hein
        Paul B. Henson
        Kihong Heo
        Jeff Hodges
        Christopher Hogan
        Love Hörnquist Åstrand
        Ken Hornstein
        Henry B. Hotz
        Luke Howard
        Jakub Hrozek
        Shumon Huque
        Jeffrey Hutzelman
        Sergey Ilinykh
        Wyllys Ingersoll
        Holger Isenberg
        Spencer Jackson
        Diogenes S. Jesus
        Mike Jetzer
        Pavel Jindra
        Brian Johannesmeyer
        Joel Johnson
        Lutz Justen
        Ganesh Kamath
        Alexander Karaivanov
        Anders Kaseorg
        Bar Katz
        Zentaro Kavanagh
        Mubashir Kazia
        W. Trevor King
        Patrik Kis
        Martin Kittel
        Thomas Klausner
        Tomasz Kłoczko
        Matthew Krupcale
        Mikkel Kruse
        Reinhard Kugler
        Harshawardhan Kulkarni
        Tomas Kuthan
        Pierre Labastie
        Andreas Ladanyi
        Chris Leick
        Volker Lendecke
        Jan iankko Lieskovsky
        Todd Lipcon
        Oliver Loch
        Chris Long
        Kevin Longfellow
        Frank Lonigro
        Jon Looney
        Nuno Lopes
        Todd Lubin
        Ryan Lynch
        Glenn Machin
        Roland Mainz
        Sorin Manolache
        Robert Marshall
        Andrei Maslennikov
        Michael Mattioli
        Nathaniel McCallum
        Greg McClement
        Cameron Meadors
        Vipul Mehta
        Alexey Melnikov
        Ivan A. Melnikov
        Franklyn Mendez
        Mantas Mikulėnas
        Markus Moeller
        Kyle Moffett
        Paul Moore
        Keiichi Mori
        Michael Morony
        Sam Morris
        Zbysek Mraz
        Edward Murrell
        Joshua Neuheisel
        Nikos Nikoleris
        Demi Obenour
        Felipe Ortega
        Michael Osipov
        Andrej Ota
        Dmitri Pal
        Javier Palacios
        Dilyan Palauzov
        Tom Parker
        Eric Pauly
        Leonard Peirce
        Ezra Peisach
        Alejandro Perez
        Zoran Pericic
        W. Michael Petullo
        Mark Phalan
        Sharwan Ram
        Brett Randall
        Jonathan Reams
        Jonathan Reed
        Robert Relyea
        Tony Reix
        Martin Rex
        Pat Riehecky
        Julien Rische
        Jason Rogers
        Matt Rogers
        Nate Rosenblum
        Solly Ross
        Mike Roszkowski
        Guillaume Rousse
        Joshua Schaeffer
        Alexander Scheel
        Jens Schleusener
        Ryan Schmidt
        Andreas Schneider
        Paul Seyfert
        Tom Shaw
        Jim Shi
        Jerry Shipman
        Peter Shoults
        Richard Silverman
        Cel Skeggs
        Simo Sorce
        Michael Spang
        Michael Ströder
        Bjørn Tore Sund
        Ondřej Surý
        Joseph Sutton
        Joe Travaglini
        Sergei Trofimovich
        Greg Troxel
        Fraser Tweedale
        Tim Uglow
        Rathor Vipin
        Denis Vlasenko
        Thomas Wagner
        Jorgen Wahlsten
        Stef Walter
        Max (Weijun) Wang
        John Washington
        Stef Walter
        Xi Wang
        Nehal J Wani
        Kevin Wasserman
        Margaret Wasserman
        Marcus Watts
        Andreas Wiese
        Simon Wilkinson
        Nicolas Williams
        Ross Wilper
        Augustin Wolf
        Garrett Wollman
        David Woodhouse
        Tsu-Phong Wu
        Xu Qiang
        Neng Xue
        Zhaomo Yang
        Tianjiao Yin
        Nickolai Zeldovich
        Bean Zhang
        ChenChen Zhou
        Hanz van Zijst
        Gertjan Zwartjes
    
    The above is not an exhaustive list; many others have contributed in
    various ways to the MIT Kerberos development effort over the years.
    

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