Setting up GNUPG for public key encryption:-

zodiac@zodioc:~$ gpg --gen-key
gpg (GnuPG) 1.4.9; Copyright (C) 2008 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Please select what kind of key you want:
(1) DSA and Elgamal (default)
(2) DSA (sign only)
(5) RSA (sign only)
Your selection?
DSA keypair will have 1024 bits.
ELG-E keys may be between 1024 and 4096 bits long.
What keysize do you want? (2048)
Requested keysize is 2048 bits
Please specify how long the key should be valid.
0 = key does not expire
= key expires in n days
w = key expires in n weeks
m = key expires in n months
y = key expires in n years
Key is valid for? (0)
Key does not expire at all
Is this correct? (y/N) y

You need a user ID to identify your key; the software constructs the user ID
from the Real Name, Comment and Email Address in this form:
"Heinrich Heine (Der Dichter) "

Real name: Celsius Thomas
Email address: aarklon@gmail.com
Comment: My work key
You selected this USER-ID:
"Celsius Thomas (My work key) "

Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? o
You need a Passphrase to protect your secret key.

We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
+++++.++++++++++...+++++..+++++.++++++++++++++++++++++++++++++...+++++++++++++++..+++++++++++++++++++++++++.+++++..+++++.+++++++++++++++.+++++.+++++>+++++..+++++...>+++++<+++++....................+++++

Not enough random bytes available. Please do some other work to give
the OS a chance to collect more entropy! (Need 265 more bytes)
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
++++++++++.+++++++++++++++.+++++++++++++++.++++++++++++++++++++..+++++.++++++++++++++++++++++++++++++.++++++++++...++++++++++.+++++.++++++++++...+++++++++++++++>++++++++++.......................................................................................................................>..+++++.................+++++^^^
gpg: key 56B304BA marked as ultimately trusted
public and secret key created and signed.

gpg: checking the trustdb
gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
gpg: depth: 0 valid: 2 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 2u
pub 1024D/56B304BA 2010-04-03
Key fingerprint = B532 09BB DBE5 4D7B 1D8F 04BA BC4A 2B17 56B3 04BA
uid Celsius Thomas (My work key)
sub 2048g/6D422200 2010-04-03