Symantec PGP Viewer for ios

Transcription

1 Symantec PGP Viewer for ios User's Guide 1.0

2 The software described in this book is furnished under a license agreement and may be used only in accordance with the terms of the agreement. Version Last updated: July Legal Notice Copyright (c) 2011 Symantec Corporation. All rights reserved. Symantec, the Symantec Logo, PGP, Pretty Good Privacy, and the PGP logo are trademarks or registered trademarks of Symantec Corporation or its affiliates in the U.S. and other countries. Other names may be trademarks of their respective owners. The product described in this document is distributed under licenses restricting its use, copying, distribution, and decompilation/reverse engineering. No part of this document may be reproduced in any form by any means without prior written authorization of Symantec Corporation and its licensors, if any. THE DOCUMENTATION IS PROVIDED"AS IS"AND ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID. SYMANTEC CORPORATION SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING, PERFORMANCE, OR USE OF THIS DOCUMENTATION. THE INFORMATION CONTAINED IN THIS DOCUMENTATION IS SUBJECT TO CHANGE WITHOUT NOTICE. The Licensed Software and Documentation are deemed to be commercial computer software as defined in FAR and subject to restricted rights as defined in FAR Section "Commercial Computer Software - Restricted Rights" and DFARS , et seq. Commercial Computer Software and Commercial Computer Software Documentation, as applicable, and any successor regulations. Any use, modification, reproduction release, performance, display or disclosure of the Licensed Software and Documentation by the U.S. Government shall be solely in accordance with the terms of this Agreement. Symantec Corporation 350 Ellis Street Mountain View, CA Symantec Home Page ( Printed in the United States of America

3 Contents About PGP Viewer for ios 3 Overview 3 Important Terms 4 Audience 4 Technical Support 5 Contacting Technical Support 5 Licensing and registration 6 Customer service 6 Support agreement resources 6 Installing PGP Viewer for ios 7 System Requirements 7 Installing PGP Viewer for ios 7 Uninstalling PGP Viewer for ios 8 Configuring PGP Viewer for ios 9 Overview 9 Using a Configuration File 10 Manual Configuration 11 Manual Configuration with a Proxy Server 11 Importing a Client Key Mode or Server Client Key Mode Key 12 Using PGP Viewer for ios 13 Messages 13 Opening PGP/MIME and Partitioned text/html Messages 14 Opening Partitioned text/plain Messages 14 Replying to Messages 15 About Attachments 15 Opening Attachments 16 Signatures 17 Settings 17 PGP Account 18 Keys 18 Signature Verification 18 Help 18 About 18 User License Agreement 19

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5 1 About PGP Viewer for ios PGP Viewer for ios decrypts, verifies, and displays PGP-encrypted messages and attachments on devices running Apple ios software. Note: You cannot encrypt or sign messages at this time using PGP Viewer for ios. You must have a managed account on a PGP Universal Server with the LDAP Directory Synchronization feature enabled in order to use PGP Viewer for ios. Note: Some features of PGP Viewer for ios may be controlled by settings or policies of the PGP Universal Server. These features will be grayed out or not settable on your ios device. In This Chapter Overview... 3 Important Terms... 4 Audience... 4 Technical Support... 5 Overview There are three general things you need to do to use PGP Viewer for ios: 1 Configure the client on your ios device to pick up from the account managed by your organization's PGP Universal Server. This is outside the scope of this document. You can search the Internet for information about your ios device and ask your organization's PGP administrator or IT staff for information about the account managed by your organization's PGP Universal Server. 2 Install and configure PGP Viewer for ios on your ios device. Covered in this document. Contact your PGP administrator for information specific to your organization. 3 Open, decrypt, and read encrypted messages in your client using PGP Viewer for ios. Also covered in this document. See Installing PGP Viewer for ios (on page 7). See Configuring PGP Viewer for ios. This section describes how to configure PGP Viewer for ios after installation. Note: In order to configure PGP Viewer for ios, you must be able to connect with your organization's PGP Universal Server. See Using PGP Viewer for ios (on page 13).

6 4 About PGP Viewer for ios Important Terms Important Terms Understanding the following terms makes it easier to use PGP Viewer for ios: PGP Viewer for ios: A software product from Symantec Corporation that decrypts, verifies, and displays PGP-encrypted messages and attachments from a PGP Universal Server-managed account on an Apple ios device. ios device: A device from Apple Computer that runs their ios mobile operating system. The iphone, ipod Touch, and ipad are all ios devices. PGP-encrypted message: An message (and attachments) that has been encrypted by a PGP encryption application. PGP Universal Server: A software/hardware product from Symantec Corporation used for configuration and management of PGP encryption applications. You must have an account on a PGP Universal Sever with the LDAP Directory Synchronization feature enabled to use PGP Viewer for ios. encrypt: To scramble data so that it is unreadable. decrypt: To take encrypted data and make it readable again. enrollment: A process that establishes a relationship between a PGP Universal Server and client software, such as PGP Viewer for ios. This can be done for PGP Viewer for ios automatically using a configuration file or manually by entering the required configuration information. LDAP Directory Synchronization: a feature of PGP Universal that lets your PGP Universal Server query your organization's LDAP directory server (a Microsoft Active Directory server, for example), thus accessing existing information about configured users, including their authentication credentials. Audience The PGP Viewer for ios User's Guide tells you how to use PGP Viewer for ios on an ios device. The intended audience is anyone who will be using PGP Viewer for ios to decrypt, verify, and display encrypted messages on their ios device. For information about deploying and managing PGP Viewer for ios, refer to the PGP Viewer for ios Administrator's Guide.

7 About PGP Viewer for ios Technical Support 5 Technical Support Symantec Technical Support maintains support centers globally. Technical Support s primary role is to respond to specific queries about product features and functionality. The Technical Support group also creates content for our online Knowledge Base. The Technical Support group works collaboratively with the other functional areas within Symantec to answer your questions in a timely fashion. For example, the Technical Support group works with Product Engineering and Symantec Security Response to provide alerting services and virus definition updates. Symantec s support offerings include the following: A range of support options that give you the flexibility to select the right amount of service for any size organization Telephone and/or Web-based support that provides rapid response and up-to-theminute information Upgrade assurance that delivers software upgrades Global support purchased on a regional business hours or 24 hours a day, 7 days a week basis Premium service offerings that include Account Management Services For information about Symantec s support offerings, you can visit our Web site at the following URL: All support services will be delivered in accordance with your support agreement and the then-current enterprise technical support policy. Contacting Technical Support Customers with a current support agreement may access Technical Support information at the following URL: Before contacting Technical Support, make sure you have satisfied the system requirements that are listed in your product documentation. Also, you should be at the computer on which the problem occurred, in case it is necessary to replicate the problem. When you contact Technical Support, please have the following information available: Product release level Hardware information Available memory, disk space, and NIC information Operating system Version and patch level Network topology Router, gateway, and IP address information

8 6 About PGP Viewer for ios Technical Support Problem description: Error messages and log files Troubleshooting that was performed before contacting Symantec Recent software configuration changes and network changes Licensing and registration If your Symantec product requires registration or a license key, access our technical support Web page at the following URL: Customer service Customer service information is available at the following URL: Customer Service is available to assist with non-technical questions, such as the following types of issues: Questions regarding product licensing or serialization Product registration updates, such as address or name changes General product information (features, language availability, local dealers) Latest information about product updates and upgrades Information about upgrade assurance and support contracts Information about the Symantec Buying Programs Advice about Symantec's technical support options Nontechnical presales questions Issues that are related to CD-ROMs or manuals Support agreement resources If you want to contact Symantec regarding an existing support agreement, please contact the support agreement administration team for your region as follows: Asia-Pacific and Japan Europe, Middle-East, Africa North America, Latin America customercare_apac@symantec.com semea@symantec.com supportsolutions@symantec.com

9 2 Installing PGP Viewer for ios This section includes PGP Viewer for ios system requirements and instructions for installing and uninstalling PGP Viewer for ios. In This Chapter System Requirements... 7 Installing PGP Viewer for ios... 7 Uninstalling PGP Viewer for ios... 8 System Requirements PGP Viewer for ios system requirements are: iphone, iphone 3G, iphone 3GS, iphone 4, and ipod Touch running ios 4.x or greater; ipad and ipad 2 running ios 3.2 or greater. PGP Viewer for ios supports all resolutions of these ios devices in both portrait and landscape orientations. PGP Viewer for ios requires a managed account on a PGP Universal Server with the LDAP Directory Synchronization feature enabled. Note: You can install PGP Viewer for ios on an ios device without having a managed account on a PGP Universal Server. You cannot configure or use PGP Viewer for ios without such an account, however. Installing PGP Viewer for ios The PGP Viewer for ios app is obtained from the Apple App Store. Note: Access to the Apple App Store is required for this procedure. To install PGP Viewer for ios: 1 On your ios device, access the Apple App Store. 2 In the Search field (in the upper right corner of the screen), enter PGP Viewer for ios, then tap Search. 3 Tap the icon for PGP Viewer for ios. 4 On the PGP Viewer for ios page, tap FREE under the PGP Viewer for ios icon. 5 Tap INSTALL APP.

10 8 Installing PGP Viewer for ios Uninstalling PGP Viewer for ios 6 If an Apple ID Password dialog box appears, enter your Apple ID password, then tap OK. PGP Viewer for ios is installed onto your ios device. Uninstalling PGP Viewer for ios To uninstall PGP Viewer for ios: 1 On your ios device, tap and hold on the icon of an app. All visible apps will begin to shake, and an x in a circle appears in the upper left corner of each app's icon. 2 Tap the x of the Symantec PGP Viewer for ios app. 3 Tap Delete when the confirmation dialog appears. The icon for Symantec PGP Viewer for ios disappears.

11 3 Configuring PGP Viewer for ios This section describes how to configure PGP Viewer for ios after installation. Note: In order to configure PGP Viewer for ios, you must be able to connect with your organization's PGP Universal Server. In This Chapter Overview... 9 Using a Configuration File...10 Manual Configuration...11 Manual Configuration with a Proxy Server...11 Importing a Client Key Mode or Server Client Key Mode Key...12 Overview To configure PGP Viewer for ios, you must do two things: 1 Enroll with your organization's PGP Universal Server. 2 Get your key onto your ios device. (Depending on the key mode of your key, this may be done automatically for you.) There are three ways to enroll PGP Viewer for ios with a PGP Universal Server: Via a configuration file. In this case, your administrator provides you with a file that includes all of the configuration information you need. Manually entering required information, with a direct connection to your organization's PGP Universal Server. In this case, you manually enter the required configuration information onto your ios device. Manually entering required information, connecting to your organization's PGP Universal Server via a proxy server. In this case, you manually enter the required configuration information plus your proxy server information. See Using a Configuration File (on page 10). See Manual Configuration (on page 11). See Manual Configuration with a Proxy Server (on page 11). How you get the PGP key that can decrypt your encrypted messages onto your ios device depends on its key mode: Server Key Mode (SKM). Your key and its passphrase is stored on your PGP Universal Server. During enrollment, your key will automatically be sent to your ios device.

12 10 Configuring PGP Viewer for ios Using a Configuration File Guarded Key Mode (GKM). Your key is stored encrypted on your PGP Universal Server. During enrollment, your key will automatically be sent to your ios device. When it is downloaded, you will be prompted to enter the passphrase. Client Key Mode (CKM). Your key and its passphrase are stored on your local computer, not on your PGP Universal Server. In order to use your key with PGP Viewer for ios, you will need to import it onto your ios device. Server Client Key Mode (SCKM). Your key's private encryption subkeys are stored both on your local computer and on the PGP Universal Server; your key's private signing subkeys are stored only on your local computer. In order to use your key with PGP Viewer for ios, you will need to import it onto your ios device. See Importing a Client Key Mode or Server Client Key Mode Key (on page 12). Using a Configuration File Use Auto Setup if you received a PGP Viewer for ios configuration file attached to an message. Note: The configuration file cannot be encrypted. It will not work if it is encrypted. If the configuration file you have is encrypted, contact the person you received it from and ask that a decrypted version be sent to you. To configure PGP Viewer for ios using a configuration file: 1 Make sure you have a decrypted configuration file on your ios device. It could be named enroll.pgp or something similar. 2 Tap and hold the icon for the configuration file on your ios device. 3 Tap Open in "Symantec PGP Viewer for ios" when it appears. 4 On the User License screen, tap Accept. 5 On the Instructions screen, tap Setup. The Symantec PGP screen appears with the information from the configuration file in the appropriate fields. 6 Enter your LDAP password (the configuration file never includes passwords), then tap Next. If the configuration file included proxy server settings, the Proxy Setup screen appears with the proxy server information from the configuration file in the appropriate fields. 7 Enter your proxy server password in the Password field, if required, then tap Next. 8 If you have a GKM key, you will be prompted to enter the passphrase of the private key on the Authenticating dialog. Enter the appropriate passphrase, then tap Done. 9 Tap OK when the Success dialog appears. PGP Viewer for ios is ready for use.

13 Configuring PGP Viewer for ios Manual Configuration 11 Manual Configuration Use manual configuration without the proxy server option if you did not receive a configuration file from your PGP Viewer for ios administrator and you do not connect to your PGP Universal Server through a proxy server. To manually configure PGP Viewer for ios: 1 After installation, tap the PGP Viewer for ios icon on your ios device. 2 On the User License screen, tap Accept. 3 On the Instructions screen, make sure the Proxy Server option is set to OFF, then tap Setup. 4 On the Symantec PGP screen, in the Server field, enter the fully qualified domain name of your organization's PGP Universal Server. For example, keys.example.com. You can also enter its IP address, if you have that information. 5 In the User field, enter your username on your organization's PGP Universal Server. 6 In the Password field, enter the password for your account. 7 Tap Next. 8 If you have a GKM key, you will be prompted to enter the passphrase of the private key on the Authenticating dialog. Enter the appropriate passphrase, then tap Done. 9 Tap OK when the Success dialog appears. PGP Viewer for ios is ready for use. Manual Configuration with a Proxy Server Use manual configuration with the proxy server option if you did not receive a configuration file from your PGP Viewer for ios administrator but you do connect to your PGP Universal Server through a proxy server. To manually configure PGP Viewer for ios with a proxy server: 1 After installation, tap the PGP Viewer for ios icon on your ios device. 2 On the User License screen, tap Accept. 3 On the Instructions screen, make sure the Proxy Server option is set to ON, then tap Setup. 4 On the Symantec PGP screen, in the Server field, enter the fully qualified domain name of your organization's PGP Universal Server. For example, keys.example.com. You can also enter its IP address, if you have that information. 5 In the User field, enter your username on your organization's PGP Universal Server.

14 12 Configuring PGP Viewer for ios Importing a Client Key Mode or Server Client Key Mode Key 6 In the Password field, enter the password for your account. 7 Tap Next. 8 On the Proxy Setup screen, in the Proxy Sever field, enter the name or IP address of the proxy server. 9 In the Port field, enter the port number of the proxy server (if required). 10 In the Username field, enter your username on the proxy server (if required). 11 In the Password field, enter your password on the proxy server (if required). 12 Tap Next. 13 If you have a GKM key, you will be prompted to enter the passphrase of the private key on the Authenticating dialog. Enter the appropriate passphrase, then tap Done. 14 Tap OK when the Success dialog appears. PGP Viewer for ios is ready for use. Importing a Client Key Mode or Server Client Key Mode Key To import a Client Key Mode (CKM) or Server Client Key Mode (SCKM) key on your ios device: 1 Export the CKM or SCKM key, including the private portion, to a file. 2 the key file, as an attachment, to the account on your ios device. 3 Open the message and tap the icon for the attachment. 4 Tap Open in "PGP Viewer for ios" when the text appears above the icon. PGP Viewer for ios will import the key, making it available for decrypting. To verify that a key has been imported: 1 Open PGP Viewer for ios. 2 Tap Settings on the PGP Viewer for ios Toolbar. 3 Tap Keys on the Settings screen. 4 Verify that the key you imported appears on the Keys screen.

15 4 Using PGP Viewer for ios Once PGP Viewer for ios is installed and configured on your ios device, you can use it to decrypt, verify, and view encrypted messages. You can also decrypt attachments, view signatures, and control various other settings. Note: You cannot encrypt or sign messages at this time using PGP Viewer for ios. In This Chapter Messages...13 About Attachments...15 Signatures...17 Settings...17 Messages PGP Viewer for ios supports two message formats: PGP/MIME. A newer, standards based format for PGP-encrypted messages. Partitioned. An older format for PGP-encrypted messages that comes in two flavors, text/plain and text/html. When you receive encrypted PGP/MIME and Partitioned text/html messages, you will see attachments in your ios device's app instead of readable text as you normally would. Opening the attachments using PGP Viewer for ios displays the decrypted message content. See Opening PGP/MIME and Partitioned text/html Messages (on page 13). When you receive Partitioned text/plain messages, you see encrypted text instead of readable text. For these types of messages, you must copy the text to the clipboard and then open PGP Viewer for ios, which will decrypt the text on the clipboard and display it. See Opening Partitioned text/plain Messages (on page 14). See Replying to Messages (on page 14).

16 14 Using PGP Viewer for ios Messages Opening PGP/MIME and Partitioned text/html Messages When you receive encrypted PGP/MIME and Partitioned text/html messages, you will see attachments in your ios device's app instead of readable text. Opening the attachments using PGP Viewer for ios displays the decrypted message content. Note: These are not attachments in the usual sense; that is, they are not files attached to the text of the message. Instead, they are the text of the message in an attachment. With PGP/MIME messages, there will be two "attachments" near the top of the message, Version.txt and Message.pgp. You can ignore Version.txt. With Partitioned text/html messages, the "attachment", called PGPexch.htm.pgp To open PGP/MIME and Partitioned text/html messages: 1 Open the app on your ios device. 2 Select the message you want to read. 3 Tap the attachment called Message.pgp (for a PGP/MIME message) or the attachment with a filename of PGPexch.htm.pgp or PGPexch.rtf.pgp (for a Partitioned text/html message). 4 Select Open in "PGP Viewer for ios" when this text appears. PGP Viewer for ios will open, decrypt the message, verify the signature (if enabled), and then display the message. Opening Partitioned text/plain Messages When you receive a Partitioned text/plain message, you will see encrypted text where you would normally see the body of the message. To read the message, you must select the encrypted text, copy it, and open PGP Viewer for ios, which will decrypt it and display the message. To open Partitioned text/plain messages: 1 Open the app on your ios device. 2 Select the Partitioned text/plain message you want to read. 3 Select just the encrypted text, starting with ----BEGIN PGP MESSAGE---- and ending with -----END PGP MESSAGE----, and copy it. 4 Open PGP Viewer for ios. PGP Viewer for ios will open, decrypt the message on the clipboard, verify the signature (if enabled), and then display the message.

17 Using PGP Viewer for ios About Attachments 15 Replying to Messages PGP Viewer for ios does not send messages nor does it encrypt data in this release. You cannot use PGP Viewer for ios to reply to messages you decrypt. You can, however, reply to messages using your ios device's client. PGP/MIME and Partitioned text/html will show the old attachments in the reply but no encrypted or decrypted text. Partitioned text/plain will show the encrypted text in the reply. If you require that the original encrypted text be present in the reply in readable form (decrypted), copy the decrypted text from PGP Viewer for ios and paste it into the reply. Warning: If you include the decrypted text in a reply, the message will go out unencrypted. If it is intercepted in transit, it will not be protected. Consider whether this would violate your organization's security policy. If so, perhaps you should wait until you can send an encrypted reply. About Attachments When an encrypted message with an attachment is sent to you, both the body of the message and the attachment are encrypted. When the message is decrypted by PGP Viewer for ios, the attachment is also decrypted. Note: While PGP Viewer for ios can decrypt an attachment, it may not be usable on your ios device, depending on what kind of file it is. There are two kinds of "attachments" that impact your encrypted messages on PGP Viewer for ios: "actual" attachments. These are files that are attached to an message. When encryption is not involved, these are the only kind of attachments associated with messages. "body" attachments. These files are created in the encryption process. Their content is the body of the encrypted message, not a separate file attached to an message. These attachments are needed so that none of the binary content of these messages is lost in the encryption/decryption process. PGP Viewer for ios handles both actual and body attachments based on the format of the message: PGP/MIME messages always display at least two attachments when viewed on an ios device: Version.txt and Message.pgp. Version.txt includes no useful information. The encrypted body of the PGP/MIME message is stored in Message.pgp. Any actual attachments to the message do not display until Message.pgp is decrypted, at which point they can be accessed through the Attachments Toolbar icon in PGP Viewer for ios.

18 16 Using PGP Viewer for ios About Attachments Partitioned text/plain messages always display encrypted text in the body of the message. Partitioned text/plain messages have no body attachments. Any actual attachments are shown below the encrypted text and can be opened independently of the encrypted body of the message. Actual attachments are named "Attachment1.pgp", "Attachment2.pgp", and so on. To decrypt the body of Partitioned text/plain messages, you must copy the encrypted text to the clipboard and then open PGP Viewer for ios. Partitioned text/html messages are similar to Partitioned text/plain messages in that encrypted text is shown in the body of the message and actual attachments are shown at the end of the message and are named "Attachment1.pgp", "Attachment2.pgp", and so on. However, the body of the message is also in a body attachment at the end of the message and can be opened without copying it to the clipboard (it can, however, also be opened by copying it to the clipboard). The body attachments of Partitioned text/html messages will be named either PGPexch.htm.pgp or PGPexch.rtf.pgp. The easiest way to determine if an attachment to an encrypted message is an actual attachment or a body attachment is to look at its filename. If it stars with "Attachment", then it is an actual attachment. See Opening Attachments (on page 16). Opening Attachments To open an attachment to a PGP/MIME encrypted message: 1 Open the message using PGP Viewer for ios. The message will be decrypted and then displayed. 2 On the PGP Viewer for ios toolbar, tap Attachments. Note: PGP Viewer for ios displays a number in a circle on the Attachments icon; the number shown indicates how many attachments are attached to the message. The filenames of the attachments display. 3 Tap the name of the attachment to see what options are available for opening it on your ios device. To open an attachment to a Partitioned message: 1 Open the message in your app. 2 Move to the bottom of the message and look for the attachments. They will be named "Attachment1.pgp", "Attachment2.pgp", and so on. If you are opening an attachment to a Partitioned text/html message, be sure to select an actual attachment and not the body of the message in an attachment. 3 Tap the attachment, then select Open in "PGP Viewer for ios" when this text appears. PGP Viewer for ios opens, decrypts the attachment, and displays the Attachments screen. 4 Tap the name of the attachment to see what options are available for opening it on your ios device.

19 Using PGP Viewer for ios Signatures 17 Signatures PGP Viewer for ios can check the validity of (verify) the signatures of PGP-encrypted messages you receive that have been signed. By default, signature verification is on. You can turn off signature verification, which can speed up the display of decrypted messages, in the Settings. Signature verification shows: The date and time the message was signed. The name and address on the key that signed the message. The key ID of the key that signed the message. The encoding format of the key at the time the message was signed. If the message shows "(L)" after the key ID, the encoding was Partitioned; if it shows nothing after the key ID, the encoding was PGP/MIME. To verify a signature: 1 Open the message in PGP Viewer for ios. 2 Tap Signature in the Toolbar. Signature information appears. Settings PGP Viewer for ios displays the current configuration settings and gives you control over certain other settings. To display the Settings screen: 1 Open PGP Viewer for ios. 2 Tap Settings on the Toolbar. The Settings screen displays. See PGP Account (on page 17). See Keys (on page 18). See Signature Verification (on page 18). See Help (on page 18). See About (on page 18). See User License Agreement (on page 19).

20 18 Using PGP Viewer for ios Settings PGP Account Gives you control over two settings and displays current configuration information: Clear Passphrase Cache: Tap and slide to ON to clear the passphrase cache. You will be prompted for your passphrase the next time it is required. Reset Server Connections: Tap and slide to ON to reset your configuration settings (does not delete any PGP keys). You will have to go through the configuration process again if you set this to ON. This setting lets you configure PGP Viewer for ios to work with a different PGP Universal Server without having to reinstall the app. PGP Server: Shows the currently configured PGP Universal Server. Proxy Server: Shows the currently configured proxy server (if any). Keys Displays a list of PGP keys on the device. To delete a key: 1 Swipe across the listing of the key you want to delete. 2 Tap Delete when it appears. The key is deleted. Signature Verification Controls the status of signature verification. The default is ON. Turn off signature verification to speed up message decryption. To change the signature verification setting: From ON to OFF, tap the open space to the right of ON and slide it to the left. From OFF to ON, tap the open space to the left of OFF and slide it to the right. Help Displays the on-device help for PGP Viewer for ios. About Displays the version of PGP Viewer for ios currently installed.

21 Using PGP Viewer for ios Settings 19 User License Agreement Displays the End User License Agreement for PGP Viewer for ios.