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                   Kerberos Version 5, Release 1.21

                            Release Notes
                        The MIT Kerberos Team

Copyright and Other Notices
---------------------------

Copyright (C) 1985-2022 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
[email protected].

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 transition
--------------

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.  If only some KDCs in a realm have been upgraded
across version 1.20, the upgraded KDCs will reject S4U requests
containing tickets from non-upgraded KDCs and vice versa.

Triple-DES transition
---------------------

Beginning with the krb5-1.19 release, a warning will be issued if
initial credentials are acquired using the des3-cbc-sha1 encryption
type.  In future releases, this encryption type will be disabled by
default and eventually removed.

Beginning with the krb5-1.18 release, single-DES encryption types have
been removed.

Major changes in 1.21
---------------------

krb5-1.21 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
    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
    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
    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.
Other acknowledgments (for bug reports and patches) are in the
doc/CHANGES file.