PGP 5.5 Installation Manual

PGP

Installation Guide

Copyright © 1990-1998 Network Associates, Inc. and its Affiliated Companies. All Rights
Reserved.

PGP*, Version 6.0.2 for Windows 95, 98, and NT, and Macintosh
11-98. Printed in the United States of America.
PGP,Pretty Good,andPretty Good Privacyare registeredtrademarks of NetworkA ssociates,

Inc. and/or its Affiliated Comp anies in the US and other countries. All other registered and
unregistered trademarks in this document are the sole property of their respective owners.

Portions of this software may use public key algorithms described in U.S. Patent numbers
4,200,770, 4,218,582, 4,405,829, and 4,424,414, licensed exclusively by Public Key Partners; the
IDEA(tm) cryptographic cipher described in U.S. patent num ber 5,214,703, licensed from
Ascom Tech AG; and the Northern Telecom Ltd., CAST Encryption Algorithm, licensed from
NorthernTelecom,Ltd. IDEAis a trademarkof AscomTech AG. NetworkAssociatesInc. may
have patents and/or pending patent applications covering subject matter in this software or
its documentation; the furnishing of this software or documentation does not give you any
license to these patents. The compression code in PGP is by Mark Adler and Jean-Loup Gailly,
used with permission fro m the free Info-ZIP implementation. LDAP software provided
courtesyUniversity of Michigan at Ann Arbor, Copyright © 1992-1996 Regents of the
University of Michigan. All rights reserved. This product includes software developed by the
Apache Group for use in the Apache HTTP server project (http://www.apache.org/).
Copyright©1995-1997 The ApacheGroup.Allrights reserved. See textfilesincluded with the
softwareor the PGP web site for further information. This softwareis based in part on the
work of the Independent JPEG Group. Soft TEMPEST font courtesy of Ross Anderson and
Marcus Kuhn.

The software provided with this documentationis licensed to you for your individual use
under the terms of the End User License Agreement and Limited Warranty provided with the
software. The information in this document is subject to change without notice. Network
Associates Inc. does not warrant that the information meets your requirements or that the
information is free of errors. The information may include technical ina ccuracies or
typographical errors. Changes may be made to the information and incorporated in new
editions of this document, if and when made available by Network Associates I nc.

Export of this software and documentation may be subjectto compliance with the rules and
regulations promulgated from time to time by the Bureau of Export Administration, United
States Department of Commerce, which restrict the export and re-export of certain products
and technical data.

Network Associates, Inc. [phone] main
3965 Freedom Circle [phone] fax
Santa Clara, CA 95054 http://www.nai.com

[e-mail]

* is sometimes used instead of the ® for registered trademarks to protect marks registeredoutside of the
U.S.

LIMITED WARRANTY

Limited Warranty.

Network Associateswarrants that for sixty (60) days from the date of
originalpurchasethemedia (forexample diskettes)on whichthe Softwareis containedwill be
free from defects in m aterials and workmanship.

CustomerRemedies.

Network Associates' and its suppliers' entire liabilit y a nd your exclusive
remedyshallbe, atNetworkAssociates' option, either(i)return of the purchaseprice paid for
the license, if any, or (ii) replacement of the defe ctivemedia in which the Software is contained
with a copy on nondefective media. You must return the defective media to Network
Associates at your expense with a copy of your receipt. This limited warranty is void if the
defect has resulted from accident, abuse, or m isapplication. Any replacement media will be
warranted for the remainder of the original warranty period. Outside the United States, this
remedyis notavailableto theextent NetworkAssociatesis subjectto restrictionsunder United
States export control laws and regulations.

Warranty Disclaimer.

To themaximum extentper m itted by applicable law,andexceptfor the
limited warranty set forth herein, THE SOFTWARE IS PROVIDED ON AN "AS IS" BASIS
WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED . WITHOUT LIMITING
THE FOREGOING PROVISIONS, YOU ASSUME RESPONSIBILITY FOR SELECTING THE
SOFTWARE TO ACHIEVE YOUR INTENDED RESULTS, AND FOR THE INSTALLATION
OF, USE OF, AND RESULTS OBTAINED FROM THE SOFTWARE. WITHOUT LIMITING
THE FOREGOINGPROVISIONS, NETWORK ASSOCIATES MAKES NO WARRANTY
THATTHESOFTWAREWILLBEERROR-FREEORFREEFROMINTERRUPTIONSOR
OTHER FAILURES OR THAT THE SOFTWARE WILL MEET YOUR REQUIREMENTS. TO
THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, NETWORK ASSOCIATES
DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, AND NONINFRINGEMENT WITH RESPECT TO THE
SOFTWARE AND THE ACCOMPANYING DOCUMENTATION. SOME STATES AND
JURISDICTIONS DO NOT ALLOW LIMITATIONS ON IMPL IED WARRANTIES, SO THE
ABOVE LIMITATION MA Y NOT APPLY TO YOU. The foregoing provisions shall be
enforceable to the maximum extent permitted by applicable law.

Table of Contents

Chapter1. Introduction ........................................7

HowtoContactNetworkAssociates,Inc. .............................7

Customerservice .............................................7

Technicalsupport ............................................7

NetworkAssociatestraining ........................................8

Yourfeedbackiswelcome..........................................8

Relatedreading ...................................................9

Chapter2. InstallingPGP .....................................11

Systemrequirements .............................................11

Compatibilitywithotherversions...............................12

Upgradingfromapreviousversion.........................12

InstallingPGPVersion6.0forWindows95,98,andNT .................14

InstallingPGPVersion6.0forMacintosh.............................17

Index.......................................................19

Installation Guide v

Table of Contents

vi PGP

1Introduction

Welcome to PGP software! This Quick Start guide provides genera l
information about PGP and describes the system requirements and
installation instructions necessary to successfullyrun it.

How to Contact Network Associates, Inc.

Customer service

To order products or obtain product information, contact the Network
Associates Customer Care department.

You can contact Customer Care at one of the following numbers Monday
through Friday between 6:00

Phone [phone]

Or write to:

Network Associates, Inc.
3965 Freedom Circle
Santa Clara, CA 95054
U.S.A.

A.M. and 6:00 P.M. Pacific time.

1

Technical support

Network Associatesis famous for its dedicationto customer satisfaction. We
have continued this tradition by making our site on the World Wide Web a
valuable resource for answers to technical support issues. We encourage you
to make this your first stop for answers to frequently asked questions, for
updatesto NetworkAssociatessoftware,andfor accessto NetworkAssociates
news and encryption information

World Wide W eb http://www.nai.com

Technical Support for your PGP product is also available through these
channels:

Phone
Email [e-mail]

.

[phone]

Installation Guide 7

Introduction

To provide the answers you need quickly and efficiently, the Network
Associates technical support staff needs some information about your
computer and your so ftware. Please have this information ready before you
call:

•PGPproductname

• PGP product version

• Computer platform and C PU type

• Amount of available memory (RAM)

• Operating system and version and type of network

• Contentofanystatusor error message displayed on screen orappearingin
a log file (not all products produc e log files)

• Email application and version (if the prob lem involve s using PGP with an
email product, for example, the Eudora plug-in)

Network Associates training

For informationaboutschedulingon-site training foranyNetworkAssociates
product, call [phone].

Your feedback is welcome

We continually enhancePGPproductsandwelcomecustomerfeedback as we
design new versions. We appreciate your interestin PGP products and your
thoughts on product content and functionality . Feedback like yours helps us
to develop richer and easier- to- use software and services. While we cannot
incorporate all suggestions, we will give your input serious conside ration as
we develop future products.

8PGP

Relate d read i ng

Here are some documents that you may find helpful in understanding
cryptography:

Non-Technica l and beginning technica l books

•“Cryptography for the Internet,” by Philip R. Zimmermann. Sc ientific
American, October 1998. This article,writtenby PGP’s creator,is a tutorial
onvariouscryptographic protocolsand algorithms, manyofwhich happen
to be used by PGP.

•“Privacy on the Line,” by Whitfield Diffie and Susan Eva Landau. MIT Press;
ISBN: 0262041677. This book is a discussion of the history and policy
surrounding cryptography and communications security. It is an excellent
read, even for beginners and non-technical people, and contains
information that even a lo t of experts don't know.

•“TheCodebreakers,”by David Kahn. Scribner;ISBN: 0684831309. This book
is a history of codes and code breakers from the time of the Egyptians to the
end of WWII. Kah n first wrote it in the sixties, and published a revised
edition in 1996. This book won't teach you anything about how
cryptography is accomplished, but it has been the inspirationof the whole
modern generation of cryptographers.

Introduction

• “Network Security: Private Communi cation in a Public World,” by Charlie
Kaufman, Radia Perlman, a nd Mike Spencer. Pr entice Hall; ISBN :
0-13-061466-1. This is a good description of network security systems and
protocols, including descriptions of what works, what doesn't work, and
why. Published in 1995, it doesn't have many of the lat est technological
advances, but is still a good book. It also contains one of the most clear
descriptions of how DES works of any book written.

Intermediatebooks

• “AppliedCryptography: Protocols, Algorithms, andSourceCodein C,”byBruce
Schneier.John Wiley &Sons;ISBN: 0-471-12845-7.Thisis a good beginning
technical book on howalotofcryptographyworks. Ifyouwantto become
an expert, this is the place to start.

•“Handbook of Applied Cryptography,”byAlfredJ.Menezes,PaulC.van
Oorschot, and Scott Vanstone. CRC Press; ISBN: 0-8493-8523-7. This is the
technicalbook you should read after Schneier’s book. There is a lot of
heavy-dutymath in thisbook, but it is nonethelessusable for thosewhod o
not u nderstand the math.

Installation Guide 9

Introduction

•“Internet Cryptography,” by Richard E. Smith. Addison-Wesley Pub Co;
ISBN: 0201924803. This book describes how many Internet security
protocols work. Most importantly,it describes how systems that are
designed well nonetheless end up with flaws through careless operation.
This book is light on math, and heavy on practical information.

•“Firewalls and Internet Security: Repelling the Wily Hacker,” by William R.
Cheswickand Steven M. Bellovin. Addison-Wesley Pub Co; ISBN:

0201633574. This book is written by two senior researchers at AT&T Bell
Labs and is about their experiences maintaining and redesigning AT &T's
Internet connection. Very readable.

Advanced books

•“A Course in Number Theory and Cryptography,” by Neal K oblitz.
Springer-Verlag; ISBN: 0-387-94293-9. An excellent graduate-level
mathematics textbook on number theory and cryptography.

•“DifferentialCryptanalysisofthe Data EncryptionStandard,” byEliBiham and
Adi Shamir. Springer-Verlag;ISBN: 0-387-97930-1. This book describesthe
technique of differential cryptanalys is as applied to DES. It is an excellent
book for learning about this technique.

10 PGP

2Installing PGP

This chapter describes how to ins tall PGP for Windows and PGP for
Macintosh software. Before you begin installing PGP , however, be sure to
review the system r equirements outlined below.

System requirements

To install PGP on a Windows 95, 98, or NT system, you must have:

• Windows 95, 98, or N T

•16MBRAM

• 15MBharddiskspace

To install PGP on a Macintosh system, you must have:

• Macintosh IIci or later model with 68030 or higher

• System software 7.5.5 or later

•8MBRAM

2

• 10MBharddiskspace

• 68K Macs must be running Apple’s CFM 68K 4.0 o r higher. The PGP
installer installs this if necessary.

Installation Guide 11

Installing PGP

Compatibil ity with other versions

PGP has gone through many revisions since it was released by Phil
Zimmermann as a freeware product in 1991. Although this version of PGP
represents a significant rewrite of the original program and incorporates a
completely new user interface, it has been designed to be compatible with
earlier versions o f PGP. This means that you can exchange secure email with
people who are still using these older versions of the product:

• PGP 2.6 (Distributed by MIT)

• PGP 2.7.1 for the Macintosh (Released by ViaCrypt)

• PGP 4.0 (Released by ViaCrypt)

• PGP 4.5 (Released by PGP, Inc.)

• PGP fo r Personal Privacy, Version 5.0 - 5.5

• PGP for Business Security or PGP for Email and Files Version 5.5



NOTE:PGPproducts Version5.0andlater may requiretheRSA add-on
for backward compatibility.

Upgrading from a previous version

If you are upgrading from a previous version of PG P (from PGP, Inc.,
Network Associates,Inc. or ViaCrypt), you may want to remove the old
program file s before installing PGP to f ree up some disk space. However, you
shouldbe carefulnottodeletetheprivateand publickeyring filesusedtostore
any keys you have created or collected while using the previous version.
When you install PGP, you are given the option of retaining your existing
privateandpublickeyrings,soyoudon’thavetogotothetroubleof
importing all of your old keys. To upgrade from a previous version, follow the
appropriate steps listed next.

To upgrade from PGP Version 2.6.2 or 2.7.1

1. Exit all programs or open applications.

2. Make backups of your old PGP keyrings on another volume. In PGP for
Windows versions 2.6.2 and 2.7.1, your public keys are stored in the file
titled “pubring.pgp” and your private keys are stored in the file titled
“secring.pgp”.In versions 5.x - 6.0, your public keys are stored in the file
titled “pubring.pkr” and your private keys are stored in the file
titled“secring.skr”.

12 PGP

Installing PGP

TIP: Maketwoseparatebackupsofyourkeyringsontotwo
different floppydisks justtobesafe.Be especially careful not to lose
your pr ivate keyring; ot herwise you will never be able to decrypt
anyemailmessagesorfile attachmentsencryptedwiththe lostkeys.
Store the keyrings in a secure place where only you have access to
them.

3. When you have successfully backed u p your old keyrings, remove or
archive the (old) PGP software. You have two options here:

• Manually delete the entire old PGP folder and all of its contents; or

• Manually delete the old PGP program and archive the remaining

files, especially the configuration and keyring files.



NOTE: If you obtain a copy of the patched PGP 2.6.4 version, your
old software will be able to read the RSA keys on the new 6.0
keyrings and will not fail when it encounters the new
Diffie-Hellman/DSS format ke ys. You ca n download this patch
from the Network Associates Website.

4. Install PGP Version 6.0 using the provided Installer.

5. Restart your computer.

To upgrade from PGP Version 4.x or 5.x

If you are upgrading from PGP Version 4.x or 5.x, follow the installation
instructio ns outlined in “To install PGP forWindows” on page 14 or “To

install PGP for Macintosh” on page 17.

Installation Guide 13

Installing PGP

Installing PGP Version 6.0 for Windows 95, 98, and NT

You can install the PGP software froma CD-ROM or from your company file
server. The self-extracting file, SETUP.EXE, automatically extracts and steps
you through the installation. After you install the software,you can create
your p riv a te and public key pair an d begin using PGP. Refer to the
PGPWinUsersGuide.pdf f ile include d with the program for instructions on
PGP.

To install PGP for Windows, start your computer and carefully follow the
steps outlined below.

To install PGP for Windows

1. Exit all programs currently running on your computer.

2. To install from a CD-ROM, insert it into the CD-ROM drive.
The Setup program automatically starts. If, however, the Setup program

does not initiate, double-click SETUP.EXE in the PGP product folder on
the CD-ROM.

14 PGP

To install from your company file serv er, contact your security officer
for information about the server from which to download PGP. Log on
to the server.

Double-click SETUP.EXE in the PGP product folder to start the Setup
program.

The PGP Installation screen appears.

3. Review the instructionsinthe PGP Welcomedialogbox, then click Next.
The Network Associates license agreement appears.

Installing PGP

4. Review the license agreement in formation, then click Yes to accept the
licensing terms.

The Setup program searches for o pen programs and prompts you to
close them.

If you have PGP version 4.x or 5.x cur rently installe d, the PGP setup
program prompts you to uninstall the old PGP files. Click Yes to
automatically uninstall the old version.

5. Register your product by entering your name and company name in the
User Information dialog box.

6. Click N ext.

7. Click Browse to navigate to a destination directory for your PGP files,
then click Next.

The Select Components dialog box appears, as shown in Figure 2-1.

Figure 2-1. PGP for Windows Select Components dialog box

Installation Guide 15

Installing PGP

8. Clear the components that you do not want to install. By default, each
option is selected. Your installation options are:

• PGP 6.0 Program Files (required). To installthePGP program, this

option must be selected.

• PGP 6.0 Eudora Plugin. Select this option if you want to integrate

PGP functionality with your Qualcomm Eudora email program.
PGP 6.0 supports Eudora versions 3.05 and l ater.

• PGP 6.0 MicrosoftExchange/Outlook Plugin. Select this option if

you want to integrate PGP functionality with your Microsoft
Exchange/Outlook email program. PGP 6.0 supports Outlook 97
and 98.

• PGP 6.0 MicrosoftOutlookExpressPlugin.Select this option if you

want to integrate PGP functionality with your M icrosoft Outlook
Express email program. PGP 6.0 supports the version that is
included with Internet Explorer v ersions 4.01 and later.

• PGP 6.0 User’s Manual(Adobe Acrobatformat).Select this option

to install the P GP User’s Guide.

• PGPdiskforWindows 95 and NT. Select this option to install the

PGPdisk program. PGPdisk is an easy-to-use encryption
application that enables you to s et aside an area of disk space for
storing your sensitive data.

16 PGP

9. Click Next.
The Check Setup In formation dialog box appears.

10. Review the installation settings,then click Next.
The PGP files are copied to the computer.

11. If you have keyrings on your computer from a previous version of PGP,
click Yes to use your existing keyrings.

A br o wse dialog box appears. Browse to locate your public keyring,
Pubring.pkr, and your private keyring, Secring.skr.

12. Select “Yes, I want to view the Readme file”, then click Finish to
complete the installation.

13. To launch PGPkeys immediately after the installation,select “Yes, I want
to run PGPkeys.”

14. Click Finish to complete the PGP installation.

Installing PGP Version 6.0 for Macintosh

You can install the PGP software froma CD-ROM or from your company file
server. The Installer program ( ) automatically extracts and steps you
through the installation. After you install the software, you can create your
private and public key pair and begin using PGP. Refer to the
PGPMacUsersGuide.pdf file included with the p rogram for instructions on
using PGP.

To install PGP for Macintosh, ca refully follow the steps outlined below.

To install PGP for Macintosh

1. Q u it all applicat ions running on your computer.

2. To install from a CD-ROM, insert it into the CD-ROM drive.
To install from your company file serv er, contact your security officer

for information about the server from which to download PGP. Log on
to the server.

3. Double-click the installation icon ( ) to start the Installer program.

Installing PGP

The PGP Installation screen appears.

4. Click C ontinue.
The Network Associates license agreement appears.

5. Review the license agreement information, then click Accept to continue
the installation.

The PGP Release Notes appear.

6. Review the releasenotes for known issues and export restrictions, then
click Continue.

Installation Guide 17

Installing PGP

The installation screen appears, as shown in Figure 2-2.

Figure 2-2. PGP for Mac in tosh Installation screen

7. Se lect a type of installation:

•EasyInstall.Choose E asy Install to perform a full installation of

PGP.

• Custom Install.Choose Custom Install to install PGP with

user-definable options. You are prompted to choose the
components that you want to install.

18 PGP

• Uninstall. Choose Uninstall to remove all PGP program

components from the system.

8. Se lect a location for your PGP f iles, then click Install.
A w arning screen appears advising you to close all open applications.

9. Close open applications, then click Continue.
The PGP files are copied to the computer.

10. Click Restart to reboot the computer.
The computer restarts. PGP is now installed on the computer.

Index

C

compatibility

versions of PGP 12

Customer Care

contacting 7

F

feedbackto Network Associates8

I

installing

PGP 11
PGPdisk

for windows 16

M

Macintosh

system requirements 11

N

Network Associates

contacting

Customer Care 7

training8

Network Associates feedback 8

P

PGP

compatibility 12
installing 11
Macintosh 17
platforms supported 11
system requirements 11
upgrading from a pre vio us versio n 12
upgrading from Network Associates 12

upgrading from ViaCrypt 12
versions of, compatible 12
Windows 95, 98 & NT 14

PGPdisk

for Windows 16

R

related

reading 9

S

setup.exe

installing PGP 14

system requirements

for PGP 11

T

Technical 7
technical support

e-mail address 7
information needed from user 8
online 7

training for N et work Associates products 8

scheduling 8

U

upgrading

from ViaCrypt 12

V

ViaCrypt

upgrading from 12

Installation Guide 19