Red Hat DIRECTORY SERVER 8.1 - 11-01-2010 Manual de usuario descargar pdf (Pagina 33)

• Key validity and Owner trust indicate respectively the validity of the key

and the trust in the key's owner. Key validity will show you whether a key

has expired or has been revoked (and is hence invalid). For the valid

key pair that you just created, validity and owner trust should be set to

“ultimate”. These fields are used in the Web of Trust model, explained in

Section 7.7. , and are related to public keys purporting to other people.

• The Fingerprint is a unique 40-digit hexadecimal number automatically

generated by applying a hash algorithm to the key. The fingerprint

unambiguously identifies the key worldwide. This means that no key will

have the same fingerprint of another key ever created in the whole world.

• The last 8 digits of the fingerprint make the Key ID which, being much

shorter, is used to locally identify the key for all practical purposes. While

the fingerprint is unique for each key ever created worldwide, you can

safely assume the key ID unique for each key in your keyring. (You

would need to collect dozens of thousands of public keys in your keyring

before there is a good possibility that two keys share the same key ID.)

• The bottom field shows all key components i.e. primary key and

subkey(s) along with their properties: the key ID, the algorithm used for

the key, the key size in bits, the creation date, and the expiration date (if

any). This field is called Subkey in Enigmail 0.96.0 and Key Parts in later

versions; the primary key is not shown in Enigmail 0.96.0.

Key ID and fingerprint are often prepended by the characters 0x, which is the

prefix indicating a hexadecimal number.

One or two rows of buttons at the bottom of the Key Properties window allow

you to perform different operations on the key. (In Enigmail 1.0.0, these buttons

are grouped as menu items inside a drop-down menu called Select action...)

The operations you can perform on a key depend whether you have or not the

companion private key, so you can accomplish some operations on your key

pair only and not on other people's public keys; Enigmail shows only the buttons

(or, in v1.0.0, menu items) relevant to the permitted operations.

The same operations are available from the Key Management window as well.

Now hit the Close button to close the Key Properties window and go back to

Key Management.

7.3.2. Specifying multiple user IDs

You might desire to use more than one email address to send secure email

from. In this case, you do not need to generate one key pair for each address:

you may simply associate multiple email addresses to your key pair. This will

save you from the burden of managing multiple key pairs.

Select your key pair and choose Edit → Manage User IDs from Key

Management, or choose Manage User IDs from the Key Properties of your key.

A window will pop up to show you a list of all user IDs (primary user ID and all

additional user IDs) that are currently associated with the key. If this is the first

time you perform this operation, your key will have only a primary user ID.

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Red Hat DIRECTORY SERVER 8.1 - 11-01-2010 Manual de usuario Pagina 33

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