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-
- FREQUENTLY ASKED QUESTIONS ABOUT PGP 2.6.3i
- *******************************************
-
- Last update: 24 April 1996
-
-
- [The following is a list of Frequently Asked Questions about PGPi (the
- international PGP versions) with answers. This document is also available
- in HTML format from http://www.ifi.uio.no/pgp/FAQ.shtml. Comments
- and corrections may be sent to stale@hypnotech.com.]
-
-
- CONTENTS
-
- 1. International vs US version
- 1.1. Why create an international PGP version?
- 1.2. What is the latest international version of PGP?
- 1.3. How does PGP 2.6.3i differ from MIT PGP 2.6.2?
- 1.4. How is PGP 2.6.3i compatible with other PGP versions?
- 1.5. What is RSAREF? MPILIB? What is the difference?
-
- 2. Legal issues
- 2.1. What does "international" mean? Who may use it?
- 2.2. Why isn't it official? Is it illegal to use?
- 2.3. Can I use PGP 2.6.3i for commercial purposes?
-
- 3. Getting it
- 3.1. Where can I get a copy of PGP 2.6.3i?
- 3.2. Is there a Windows version of PGP 2.6.3i?
- 3.3. How can I check the integrity of PGP 2.6.3i?
- 3.4. Where can I get updated language modules for PGP 2.6.3i?
-
- 4. Miscellaneous
- 4.1. Isn't PGP 2.6.3i the version that was weakened for export by the NSA?
- 4.2. Are there any bugs in PGP 2.6.3i?
- 4.3. Who is responsible for PGP 2.6.3i?
- 4.4. Where can I learn more about PGP?
-
-
- WHY CREATE AN INTERNATIONAL PGP VERSION?
-
- The official PGP versions from MIT (the latest of which is 2.6.2) were made
- inside the USA and intended for use in the USA alone. Due to special patent
- and copyright issues in the US, these versions contain a number of limitations
- and restrictions that are totally irrelevant for users elsewhere. When PGP
- has spread to the rest of the world, it is only natural that these limitations
- are removed. That's why we have the international PGP versions. :-)
-
-
- WHAT IS THE LATEST INTERNATIONAL VERSION OF PGP?
-
- The latest international version of PGP is 2.6.3i. It was first released on
- 18 January 1996. PGP 2.6.3i is based on the source code for MIT PGP 2.6.2
- and modified for international use. PGP 2.6.3i replaced PGP 2.6.2i.
-
-
- HOW DOES PGP 2.6.3i DIFFER FROM MIT PGP 2.6.2?
-
- The following are the most important differences:
-
- 1. It does not use the RSAREF encryption library
- 2. It is compatible with all other PGP 2.x versions
- 3. It corrects a number of bugs present in PGP 2.6.2(i)
- 4. It compiles "out of the box" for many new platforms
- 5. It adds some new features without breaking compatibility with earlier
- versions
-
- For a complete list of changes, refer to the PGP263I.DIF file in the
- source code distribution.
-
-
- HOW IS PGP 2.6.3i COMPATIBLE WITH OTHER PGP VERSIONS?
-
- PGP 2.6.3i can read and understand messages, keys and signatures created
- with any 2.x version of PGP. (Note, however, that the keys cannot be
- larger than 2048 bits. No official PGP version uses larger keys, though.)
- Because it uses MPILIB rather than RSAREF, PGP 2.6.3i is even capable of
- understanding the old key signature format in PGP 2.2 and earlier versions
- (pkcs_compat=0). It cannot write such signatures, though.
-
- PGP 2.6.3i can generate messages, keys and signatures that can be read
- and understood by any PGP 2.x version of PGP. However, if you want your
- messages to be readable by PGP 2.3a and earlier versions, it is necessary
- to uncomment the "legal_kludge = off" line in your CONFIG.TXT file.
-
-
- WHAT IS RSAREF? MPILIB? WHAT IS THE DIFFERENCE?
-
- RSAREF is a software library that implements the RSA cryptography
- routines. (RSA is one of the encryption routines used in PGP, and the very
- heart of public key encryption.) RSAREF is freeware, and is released by
- RSA Data Security Inc., the patent holder of the RSA algorithm in the US.
- Everyone in the US who wants to make use of RSA in their programs and
- give it away for free (e.g. PGP), must use RSAREF. All official MIT
- versions of PGP, starting with version 2.5, have been using RSAREF.
-
- MPILIB is simply another implementation of the same RSA routines as found
- in RSAREF. The MPILIB routines were originally written by Phil Zimmermann,
- and were used in all PGP versions up to and including version 2.3a.
- Functionally, MPILIB is identical to RSAREF, but the routines are
- generally faster than the RSAREF routines (although the speed difference
- varies between machine platforms). In addition, MPILIB is capable of
- understanding the old key signature format in PGP 2.2 and earlier versions
- (pkcs_compat=0). RSAREF, on the other hand, cannot read such signatures.
- Furthermore, MPILIB is published under the terms of the GPL, whereas
- RSAREF is not.
-
- Please note that PGP 2.6.3i uses MPILIB, _not_ RSAREF. This is the main
- reason why PGP 2.6.3i should not be used within the US. Phil Zimmermann
- said this about PGP 2.6.i, the predecessor to 2.6.3i:
-
- "The unofficial variant of PGP named PGP 2.6.i by its developers
- replaces RSAREF routines with other code implementing RSA-related
- algorithms. I am very familiar with that code, and while I tried to
- make PGP use RSAREF in a manner that did not suffer a performance
- penalty, I believe that these other subroutines are at least as
- efficient, as well as being functionally identical for PGP's purposes.
- Since the RSA patent does not exist outside the USA, it seems
- reasonable to not encumber European users with the RSAREF subroutine
- library and its own additional copyright restrictions..."
-
-
- WHAT DOES "INTERNATIONAL" MEAN? WHO MAY USE IT?
-
- PGP 2.6.3i was put together to provide an alternative to the American
- versions of PGP, which are distributed by MIT and contain a number of
- restrictions that are not relevant for users outside the USA. In general,
- "international" means "non-US", i.e. it may be used by anyone except
- those who live in the US.
-
-
- WHY ISN'T IT OFFICIAL? IS IT ILLEGAL TO USE?
-
- PGP 2.6.3i is perfectly legal to use provided that you:
-
- 1. Don't live in a country where encryption is illegal (such as France,
- Russia, Iran, Iraq or China).
- 2. Are not physically inside the USA.
- 3. Make sure that you don't download a copy of PGP that is physically
- inside the USA.
-
- The reason why PGP 2.6.3i is not official, is that is was based on source
- code that was once illegaly exported from the USA. However, once the
- program has been exported, anyone may use it freely.
-
-
- CAN I USE PGP 2.6.3i FOR COMMERCIAL PURPOSES?
-
- Yes, you can, but you need to buy a separate license for the IDEA algorithm
- used in PGP. (RSA is not patented outside the US, so you don't need a
- license for this algorithm.) IDEA licenses can be purchased from Ascom Systec
- AG in Switzerland. (The licensing of the IDEA algorithm was formerly
- administrated by Ascom Tech, but this responsibility has been transferred to
- Ascom Systec. Please, do not contact Ascom Tech about this matter!) The fee
- is charged on a per-user basis as follows:
-
- 1.. 50 users 15 US$ per copy
- 51.. 100 users 10 US$ per copy
- 101.. 250 users 8 US$ per copy
- 251.. 500 users 7 US$ per copy
- 501..1000 users 6 US$ per copy
- > 1000 users on request
-
- The end-user license can be ordered online via WWW:
-
- http://www.ascom.ch/Web/systec/security/enduser.htm
-
- For more information, contact Licensing Manager Roland Weinhart at:
-
- Ascom Systec AG
- IDEA Licensing
- Gewerbepark
- CH-5506 Maegenwil
- Switzerland
-
- Phone : +41 62 889 59 54
- Fax : +41 62 889 59 54
- Email : idea@ascom.ch
- WWW : http://www.ascom.ch/Web/systec/
-
-
- WHERE CAN I GET A COPY OF PGP 2.6.3i?
-
- PGP 2.6.3i is available both as source code and as precompiled binaries
- for some of the most popular platforms, such as MS-DOS, OS/2, Atari,
- Amiga and Macintosh. To obtain a copy of PGP 2.6.3i, try:
-
- WWW:
- http://www.ifi.uio.no/pgp/
-
- FTP:
- ftp.ifi.uio.no/pub/pgp/
- ftp.dsi.unimi.it/pub/security/crypt/PGP/
- ftp.encomix.es/pub/pgp/
- ftp.ox.ac.uk/pub/crypto/pgp/
-
- E-mail:
- Send a message to pgp@hypnotech.com with your request in the
- Subject field.
-
- Subject What you will get
- ------- -----------------
- GET pgp263i.zip MS-DOS executable (uuencoded)
- GET pgp263ix.zip 32-bit MS-DOS executable (uuencoded)
- GET pgp263i-os2.zip OS/2 executable (uuencoded)
- GET pgp263i-win32.zip Windows 95/NT text-mode executable (uuencoded)
- GET Amiga-PGP Amiga executable (uuencoded)
- GET Atari-PGP Atari executable (uuencoded)
- GET MacPGP Macintosh executable (HexBin)
- GET pgp263is.zip Source code, MS-DOS line feeds (uuencoded)
- GET pgp263is.tar.gz Source code, UNIX line feeds (uuencoded)
- GET MacPGP source Additional source code for Macintosh (HexBin)
-
- Note: The uuencoded files are not split in any way, but sent in one
- portion. Because some of the files are very big (more than 800 kbytes),
- this may cause problems if your mail system cannot handle messages of
- this size. If you don't get a reply, this is probably the reason.
-
-
- IS THERE A WINDOWS VERSION OF PGP 2.6.3i?
-
- No. There is no "true" Windows 3.1/NT/95 version of PGP, but there exists
- a number of front-end shells that wrap around the DOS versions. Precompiled
- binaries exist for MS-DOS (16-bit & 32-bit), OS/2, Amiga, Atari and Macintosh.
- There is also a Win32 (Windows 95/NT) compilation, but it's only a text-mode
- application without any fancy GUI.
-
-
- HOW CAN I CHECK THE INTEGRITY OF PGP 2.6.3i?
-
- All the PGP 2.6.3i distribution archives contain a signature file so that
- you can verify that the files have not been tampered with. In order to
- verify the signature, you need the signatory's public key:
-
- Stale Schumacher (0xCCEF447D): source code, MS-DOS, Mac and OS/2 versions
- Peter Simons (0x34D74DC1) : Amiga version
- Guy Geens (0xAB2A3F25) : Atari version
-
- All keys are available from a public keyserver. For details, send email to
- pgp-public-keys@keys.pgp.net with HELP as the Subject.
-
-
- WHERE CAN I GET UPDATED LANGUAGE MODULES FOR PGP 2.6.3i?
-
- An updated collection of translation files for both PGP 2.6.3 and 2.6.3i can
- be found at the PGPi Language Page, available via WWW from:
-
- http://www.ifi.uio.no/pgp/modules.shtml
-
- Alternatively, you can get them via anonymous FTP from:
-
- ftp.ifi.uio.no/pub/pgp/lang/
- ftp.encomix.es/pub/pgp/lang/
- ftp.ox.ac.uk/pub/crypto/pgp/language/
-
-
- ISN'T PGP 2.6.3i THE VERSION THAT WAS WEAKENED FOR EXPORT BY THE NSA?
-
- No. PGP 2.6.3i is just as secure as any other version of PGP. Neither
- Phil Zimmermann, MIT, NSA, myself nor anybody else have put any backdoor
- into PGP 2.6.3i, limited the effecive key size or otherwise done anything
- to compromise the security of the program. If you don't believe it,
- download the source code and see for yourself. The PGP source is free for
- anyone to scrutinize, and has been so for many years now. Still, nobody
- has been able to find any backdoors. Strange, isn't it?
-
-
- ARE THERE ANY BUGS IN PGP 2.6.3i?
-
- No program is 100% error free. Yet PGP 2.6.3i is probably the most bug-
- free PGP version available today. To see a list of known bugs and how to
- fix them, please refer to the PGPi Bugs Page, available via WWW from:
-
- http://www.ifi.uio.no/pgp/bugs.shtml
-
- To report new bugs, send email to pgp-bugs@ifi.uio.no.
-
-
- WHO IS RESPONSIBLE FOR PGP 2.6.3i?
-
- PGP 2.6.3i was put together and published by Stale Schumacher in Norway.
- However, this work would not have been possible without the help of many
- individuals around the world. The international PGP versions are now
- maintained and supported by an international development team, who
- coordinate their work through an Internet mailing list. If you would like
- to join this list, please contact stale@hypnotech.com.
-
- All questions regarding PGP 2.6.3i should be addressed to
- pgp-bugs@ifi.uio.no. Please note that Phil Zimmermann, MIT and the
- University of Oslo have nothing to do with PGP 2.6.3i. Comments, bug
- reports and suggestions for future releases are welcome.
-
-
- WHERE CAN I LEARN MORE ABOUT PGP?
-
- The README.1ST file in the PGP 2.6.3i distribution covers most of the
- details that are special to the international PGP versions. If you have
- access to WWW, the PGPi Home Page is an excellent starting point for
- further PGP exploration:
-
- http://www.ifi.uio.no/pgp/
-
- For information on PGP and encryption in general, check out the following
- resources:
-
- Other FAQs:
-
- PGP Frequently Asked Questions from alt.security.pgp
- http://www.prairienet.org/~jalicqui/pgpfaq.txt
- ftp://ftp.prairienet.org/pub/providers/pgp/pgpfaq.txt
- Where to Get the Latest PGP Program FAQ
- ftp://ftp.uu.net/usenet/news.answers/pgp-faq/where-is-PGP.Z
-
- WWW:
-
- Fran Litterio's PGP Page (from the Virtual Library)
- http://world.std.com/~franl/pgp/pgp.html
- The Official Bug List for MIT PGP 2.6.2
- http://www.mit.edu:8001/people/warlord/pgp-faq.html
-
- FTP:
-
- ftp://ftp.ifi.uio.no/pub/pgp/
- ftp://ftp.dsi.unimi.it/pub/security/crypt/PGP/
- ftp://ftp.ox.ac.uk/pub/crypto/pgp/
-
- Newsgroups:
-
- alt.anonymous discussion of anonymity and anon remailers
- alt.anonymous.messages for anonymous encrypted message transfer
- alt.privacy.clipper Clipper, Capstone, Skipjack, Key Escrow
- alt.security general security discussions
- alt.security.pgp discussion of PGP
- alt.security.ripem discussion of RIPEM
- alt.security.keydist key distribution via Usenet
- alt.society.civil-liberty general civil liberties, including privacy
- comp.compression discussion of compression algorithms
- comp.org.eff.news news reports from EFF
- comp.org.eff.talk discussion of EFF related issues
- comp.patents discussion of S/W patents, including RSA
- comp.risks some mention of crypto and wiretapping
- comp.society.privacy general privacy issues
- comp.security.announce announcements of security holes
- misc.legal.computing software patents, copyrights, computer laws
- sci.crypt methods of data encryption/decryption
- sci.math general math discussion
- talk.politics.crypto general talk on crypto politics
-
- Books:
-
- The Official PGP User's Guide
- by Philip R. Zimmermann
- MIT Press 1995
- ISBN 0-262-74017-6
- 216 pp. $14.95
-
- PGP: Pretty Good Privacy
- by Simson Garfinkel
- O'Reilly & Associates 1994
- ISBN 1-56592-098-8
- 430 pp. $24.95
-
- Protect Your Privacy: The PGP User's Guide
- by William Stallings
- Prentice Hall PTR 1995
- ISBN 0-13-185596-4
- 302 pp. $19.95
-
- Applied Cryptography: Protocols, Algorithms, and Source Code in C
- 2nd Edition, by Bruce Schneier
- Wiley Publishing 1996
- ISBN 0-471-11709-9
-
- E-Mail Security: How to Keep Your Electronic Mail Private
- by Bruce Schneier
- Wiley Publishing
- ISBN 0-471-05318-X
-