i'm writing a book

where can i find some information about website security ,plz.

You're writing a book about a subject you know nothing about and you don't know how to do research.... wow.

doing research do need informations.

i've searched for this subject all over the Web and found nothing relative.

the difficulty is my native language is not english. so it's not easy for me to seek for something here.

You've found nothing about security? Have you even tried Google?

Have you written an article/ dicitation on a similar subject before? I don't think it's a very good idea to start writing a book before you know something about the subject.

Incedently, infomations is not a word, use infomation.

Google "https".

Incidentally, it's information

you failed in your correcting him, and you spelled another word wrong yourself....

<edit>
...and he spelled information correctly...he just put in s on the end.
</edit>

thank all of you.
any of your answers is a great help to me,by any means.
however,isn't there any website or tutorial about website security?
for example, security of sever system, security of ASP programming.

They are ubiquitous. That you don't know enough to write on the subject without looking it up, and that you don't know enough to dig this info up with Google tells me you are without a doubt unqualified to write a book about security, website or otherwise. Technical books, when they are any good, are written by people that have expert level knowledge of the subject, not the Cliff Notes version gleaned from the net.

Sheesh.

BTW, did you know authoring a book, especially a technical one, isn't likely to make much, if any, money?