Red Hat DIRECTORY SERVER 8.1 - 11-01-2010 Instrukcja Użytkownika Pobierz pdf (Strona 35)

It is not currently possible to add a PhotoID from Enigmail, but you can do so

from GnuPG command line. Assuming that 0x89ABCDEF is your key ID, type

at the command prompt:

gpg --edit-key 0x89ABCDEF addphoto

Then enter the path of the image file. Suggested image sizes are 240x288

pixels (GnuPG) or 120x144 pixels (PGP).

Another possibility is to use Windows Privacy Tray, or WinPT for short, to

manage your key pair and add a PhotoID from there. WinPT is a Windows

front-end that provides a graphical interface for GnuPG; it is free and open-

source, and you can download it from http://winpt.gnupt.de .

The image will be ASCII-armored and included in your public key as an

additional user ID. For this reason, GnuPG and PGP recommend to use JPEG

files of maximum 7 Kb, otherwise your public key may become very big in size.

7.3.4. Changing the passphrase

To change the passphrase that protects your private key, click on your key and

choose Edit → Change Passphrase from Key Management, or click the

Change Passphrase button from Key Properties.

7.3.5. Self-signing your key

You should self-sign your key after you've finished changing its properties and

are happy with it. Self-signing ensures that nobody can tamper with the

properties of your public key. To self-sign your key, click on your key and

choose Edit → Sign Key from Key Management, or click the Sign Key button

from Key Properties.

You may also sign other people's public keys in order to build a Web of Trust,

although this is not required for basic Enigmail operations. This will be

explained in Section 7.7.1.

7.3.6. Making a backup

Once you've generated your key pair, verified its properties, and self-signed it,

it's a very good idea to make a backup copy of it.

Select your key pair from Key Management and click on File → Export Keys to

File. You will be asked whether you want to include your secret key in the

saved OpenPGP key file:

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Red Hat DIRECTORY SERVER 8.1 - 11-01-2010 Instrukcja Użytkownika Strona 35