Novell SuSE Linux Professional 9.2 Upgrade [Strong Encryption 128 Bit] 00662644457260 ユーザーズマニュアル
製品コード
00662644457260
11
Encr
yption
with
KGpg
Select the key to sign in the key list. Select ‘Keys’ ➝ ‘Sign Key(s)...’. In the follow-
ing dialog, designate the private key to use for the signature. An alert reminds
you to check the authenticity of this key before you sign it. If you have performed
this check, click ‘Continue’ and enter the password for the selected private key in
the next step. Other users can now check the signature by means of your public
key.
ing dialog, designate the private key to use for the signature. An alert reminds
you to check the authenticity of this key before you sign it. If you have performed
this check, click ‘Continue’ and enter the password for the selected private key in
the next step. Other users can now check the signature by means of your public
key.
Trusting Keys
Normally, you are asked by the corresponding program whether you trust the
key (whether you assume it is really used by its authorized owner). This happens
each time a message needs to be decrypted or a signature must be checked. To
avoid this, edit the trust level of the newly imported key. By default, a newly im-
ported key is listed with a “?”, meaning that no concrete value has been assigned
for the trust level.
key (whether you assume it is really used by its authorized owner). This happens
each time a message needs to be decrypted or a signature must be checked. To
avoid this, edit the trust level of the newly imported key. By default, a newly im-
ported key is listed with a “?”, meaning that no concrete value has been assigned
for the trust level.
Right-click the newly imported key to access a small context menu for key man-
agement. Select ‘Edit Key in Terminal’ from it. KGpg opens a text console in
which to set the trust level with a few commands.
agement. Select ‘Edit Key in Terminal’ from it. KGpg opens a text console in
which to set the trust level with a few commands.
At the prompt of the text console (
Command >
), enter
trust
. Now on a scale
between 1 and 5 make an estimate of how much you trust the signers of the im-
ported key to have checked the true identity of the key owner. Enter the selected
value at the prompt (
ported key to have checked the true identity of the key owner. Enter the selected
value at the prompt (
Your decision?
). If you are really sure about the signers’
trustworthiness, enter
5
. Answer the following question by entering
y
. Finally,
enter
quit
to exit the console and return to the list of keys. The key now has the
trust level
Ultimate
.
11.2
The Key Server Dialog
Several Internet-based key servers offer the public keys of many users. To engage
in encrypted communication with a large number of users, use these servers to
distribute your public key. For this purpose, export your public key to one of
these server. Similarly, KGpg enables you to search one of these servers for the
keys of certain people and import their public keys from the server.
in encrypted communication with a large number of users, use these servers to
distribute your public key. For this purpose, export your public key to one of
these server. Similarly, KGpg enables you to search one of these servers for the
keys of certain people and import their public keys from the server.
11.2.1
Importing a Key from a Key Server
By means of the ‘Import’ tab in the key server dialog, import public keys from
one of the Internet-based key servers. Use the drop-down menu to select one of
one of the Internet-based key servers. Use the drop-down menu to select one of
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