Ethical hacking

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"Hacking" is the ability to disassemble the structure of how something logical works.
There is no problem with ethics there.

I would imagine what you are referring to is "Cracking".

If there is no malicious intent or creation,
and it does not negatively effect any other person's or organization's property you are pretty well safe in my mind.
IE. The basis lending towards genuine self education in a positive light.
As soon as you get knowledge and try to use it to effect something outside of your domain,
then there should be cause for concern I'd like to fashion.
Intent is key.

example of an ethical hack :

<script>Alert("if a message pops up this site is weak to xss attacks")</script>


(*note: this message should not pop up because chris is smart enough to pick a board not weak to xss attacks)


I find it's best to learn by solving problems.

Nasiru,

You should be Very well thorough with / Mastering Basics of Networking and you will find the door of Mastering in security.