Javascript Obfuscators

[korund]

I want encrypt javascript code in web page, however, browser need fully
recognize it.. There any many Javascript Obfuscators in the Net. Is
there some good and handy utility(or script) among them that can be
recommended?(fr eeware)

[Julian Turner]

ko****@hotmail. com wrote:

I want encrypt javascript code in web page, however, browser need fully
recognize it..
AFAIK, encryption (if that is what you mean) is not realistically
possible client side. After all the client needs the key as well to be
able to decrypt and run the code.

Obfuscators are different to encryption. Obfuscators do not encrypt,
they just make it harder to read.
There any many Javascript Obfuscators in the Net. Is
there some good and handy utility(or script) among them that can be
recommended?(fr eeware)

If you just search this newsgroup on the word "obfuscator ", you will
find that plenty of people have asked this, and received plenty of
answers.

Also search under terms relating to compression or minimising the size
of JavaScript files.

You will find that obfuscators tend to be frowned upon, although
opinion does vary (as is the way with opinion). One common reason is
that if the script is that valuable, it is better to keep it on the
server.

If optimisation of file size is your aim, then you could look at
<URL:http://dean.edwards.na me/packer/>

Regards

Julian Turner

[korund]

Julian Turner пи�ал(а):

ko****@hotmail. com wrote:

I want encrypt javascript code in web page, however, browser need fully
recognize it..
AFAIK, encryption (if that is what you mean) is not realistically
possible client side. After all the client needs the key as well to be
able to decrypt and run the code.

Obfuscators are different to encryption. Obfuscators do not encrypt,
they just make it harder to read.

There any many Javascript Obfuscators in the Net. Is
there some good and handy utility(or script) among them that can be
recommended?(fr eeware)

If you just search this newsgroup on the word "obfuscator ", you will
find that plenty of people have asked this, and received plenty of
answers.

Also search under terms relating to compression or minimising the size
of JavaScript files.

You will find that obfuscators tend to be frowned upon, although
opinion does vary (as is the way with opinion). One common reason is
that if the script is that valuable, it is better to keep it on the
server.

If optimisation of file size is your aim, then you could look at
<URL:http://dean.edwards.na me/packer/>

Regards

Julian Turner

----------
No, the purpose if obfuscate code(just make it harder to read), not
size optimisation.
AFAIK, encryption (if that is what you mean) is not realistically
possible client side. After all the client needs the key as well to be
able to decrypt and run the code.

There is a obfuscator that can encrypt and decrypt:
http://javascript.about.com/library/blenc.htm

Thanks.

[Julian Turner]

ko****@hotmail. com wrote:

[snip]

There is a obfuscator that can encrypt and decrypt:
http://javascript.about.com/library/blenc.htm

Thanks.

[/snip]

Hmm, but I would think twice before using is. The following are quotes
from that page:-

<quote>Actually , the encryption of a page makes no difference at all to
how easily it can be stolen by knowledgeable thieves who can easily
bypass the encryption in seconds using nothing more than a web
browser</quote>

<quote>Please note that any web pages encrypted using this script (or
any encryption program that you purchase) can be easily decrypted in
under 30 seconds by anyone who knows how so don't blame us if
encrypting your page encourages its theft rather than stopping
it.</quote>

Regards

Julian Turner

[Lasse Reichstein Nielsen]

"Julian Turner" <ju****@baconbu tty.com> writes:

Hmm, but I would think twice before using is. The following are quotes
from that page:-

[protection can be broken]

That's actually refreshing honesty from someone making an obfuscator.
If I needed on (and I can't imagine for what), it would be one that
I would consider.

/L
--
Lasse Reichstein Nielsen - lr*@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleD OM.html>
'Faith without judgement merely degrades the spirit divine.'

[electrician]

I purchased Jasob 1.8 from http://www.jasob.com and it works
excellently. It removes the comments and spaces and substitutes
letters for variables and function names. Since I write engineering
programs that have many long winded variable and function names to make
it easier to program, the obfuscation does an excellent job in reducing
size and making the program virtually unreadable. While many may be
able to extract the code, few will be able to determine what the heck
is going on with all the variable substitutions and no comments. It is
hard enough for me to write the code with the comments and long
variable names.

[Julian Turner]

Lasse Reichstein Nielsen wrote:

That's actually refreshing honesty from someone making an obfuscator.
If I needed on (and I can't imagine for what), it would be one that
I would consider.

Thats true enough. Didn't mean to criticise the author as such. I
have come accross the author - Felgall, I think - in the
Webdeveloper.co m forums, and (not that I have any right to judge) he
seemed very geniune.

Regards

Julian Turner

[korund]

> Lasse Reichstein Nielsen wrote:

That's actually refreshing honesty from someone making an obfuscator.
If I needed on (and I can't imagine for what), it would be one that
I would consider.

Thats true enough. Didn't mean to criticise the author as such. I
have come accross the author - Felgall, I think - in the
Webdeveloper.co m forums, and (not that I have any right to judge) he
seemed very geniune.

Regards

Julian Turner

-------
I tried few online javascript obfuscators, all of them generate fully
'garbage' obfuscated code, but no any javascripts work anymore..
Browser not recognize it..

[Randy Webb]

el*********@ele ctrician.com said the following on 4/4/2006 12:56 PM:

I purchased Jasob 1.8 from http://www.jasob.com and it works
excellently.
Then you really are as stupid as you seem.
It removes the comments and spaces and substitutes letters for variables
and function names.
JSMin is free.....

Since I write engineering programs that have many long winded variable and
function names to make it easier to program, the obfuscation does an excellent
job in reducing size and making the program virtually unreadable.
And you paid for a program to make what you write unreadable? It was
wasted money as 99.999999999999 99999999% of what you write is unreadable
anyway.
While many may be able to extract the code, few will be able to determine
what the heck is going on with all the variable substitutions and no
comments.
You don't need the comments and lack of white space to make your code
worthless - it is already worthless.
It is hard enough for me to write the code with the comments and long
variable names.

Then learn to program and it becomes easy.

--
Randy
comp.lang.javas cript FAQ - http://jibbering.com/faq & newsgroup weekly
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

[electrician]

<You don't need the comments and lack of white space to make your code
worthless - it is already worthless.>

Ahh chucks, Randy, we can't all be as smart as you. I think Jason
needed and deserved the $99 and I enjovyed paying him. He did a hell
of a job, in my opinion. Besides it is a tax write off, and do I ever
need tax write offs. Too many people give away programs on the
Internet, when people like myself are perfectly willing to pay for
them. It is all about marketing and making money. Do you have
anything for sale, or are you just another Net Whore that gives it all
away?