模板:U Lucid/Privacy

Privacy

PGP (Message Encryption)

PGP (OpenPGP and GnuPGP) is a tool to encrypt your messages (such as email) to be unlocked only by someone who has a key to unlock it.

Seahorse

Seahorse is the GUI for Gnome to manage the key pairs and other options of GnuPGP. It can also manage your SSH keys. For more info see this tutorial. Run:

Applications -> Accessories --> Passwords and Encryption Keys

Tor (Network Privacy)

Tor is a project to allow privacy while using the Internet and limit usage tracking (by masking your IP address).

• You will also need to install privoxy:

sudo apt-get install privoxy

• Install Tor by following the instructions here. Note that the instructions require port 11371 on your firewall to be open to use the gpg keyserver (and download the key for the debian package). Then see the Tor installation guide for further details.

• Edit configuration files.

Edit the privoxy configuration file:

sudo nano /etc/privoxy/config

Add the line

forward-socks4a / localhost:9050 .

restart Privoxy:

sudo /etc/init.d/privoxy restart

Edit the Tor configuration file:

sudo nano /etc/tor/torrc

Add the line

ControlPort 9051

Comment out the line by adding a # at the beginning, so it looks like:

#RunAsDaemon 1
RunAsDaemon 0

(This prevents the Tor daemon from automatically starting at bootup.)

restart Tor

sudo /etc/init.d/tor restart

Tor GUIs

There are two main GUIs for Tor.

• Vidalia is a cross-platform Qt-based GUI for Tor. See these instructions to install it.
• TorK is the KDE interface, used in Kubuntu, but which can run in Ubuntu (Gnome) as well.

sudo apt-get install tork

In addition, a Torbutton is available for Firefox, which toggles Tor usage. Install as a Firefox add-on or:

sudo apt-get install torbutton-extension