what is encrypt and how should i do it?

Answer 1

That is something you should leave alone if you do not know how to use it.

Answer 2

Encryption is using a secret method to garble information into an unusable format. Here is an example using Triple DES encryption:

Message: Hello
Encryption keys: 3b3898371520f75e and 922fb510c71f436e

Encrypted message: aec0402012cf885c

Now, anyone who looks at "aec0402012cf885c" will see a garbled message that is completely useless. However, anyone who has the encryption keys can use them to decrypt the message and the output will be the original "Hello".

Encryption is used in programming and internet communication quite extensively. You can also obtain software to encrypt your hard drive so others cannot read the contents on it.

http://www.truecrypt.org/ is a free encryption package for hard drives and partitions.