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Re: Signing an applet

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On 2013-12-15 09:53 Arne Vajhøj wrote:
> On 12/15/2013 12:04 AM, emf wrote:
>> On 2013-12-14 00:11 Wayne wrote:
>>> On 12/13/2013 8:40 AM, emf wrote:
>>>> I am trying to understand how to self-sign an applet. I've already
>>>> checked websites
>>>> that provide directions, but unfortunately I realized that my
>>>> relevant knowledge is
>>>> too limited to start understanding what they are talking about, so I
>>>> post here hoping
>>>> I'll get some help to get me started.
>>>
>>> To sign a jar file:
>>>
>>> Part I: Create an unsigned applet that just needs to be signed to work:
>>>
>>> ...
>>
>> That was quite an interesting article. I have to read again more
>> carefully. The impression, however, that I have gotten so far is that
>> there have been serious security problems with Java applets,
>
> Yes - there has been found a lot of those the last couple of years.
>
>> them sign by an official authority is expensive,
>
> Depends on the definition of expensive.
>
> :-)
>
>>                                           and that instead of
>> having the applet embedded in the webpage probably a better idea is to
>> have the visitor choose to download the jar file on his desktop, and
>> open the applet by clicking on it. Is my impression wrong?
>
> It is a lot simpler.
>
> But note that you are moving from a deployment model where
> there may be holes int he sandbox security model to a model
> with no sandbox at all, and from a web page model to a
> desktop app model.
>
> If you really need a signed applet in the first place, then
> switching to a desktop app may not meet requirements.
>
> Arne

When I first tried to deploy the applet on a webpage, I was surprised 
that there was a security risk, and so I had to use a different method 
from the one in the textbook to read the data file to fill in the array.

However, there is a better solution: JavaScript. The reason I had chosen 
Java for this program was because I wanted it to read a long text (csv) 
file. But then I thought why not make the csv a js file, containing an 
long array[54786][3]. I'll restrict the JavaScript program to the 2 
significant planets, so the js file starts with

var ephem = [["19000101","27i43","10i08"], ["19000102",...

instead of

19000101,01i08,27i43,10i08,25c13,15c15
19990102,...

No security problem whatsoever. The 2 planets js file is smaller then 
the 5 planets csv, but the jar file is even smaller, so I'll be looking 
to see if it is already possible to use a zipped js file, otherwise the 
js will have to do as is. And I will have a link to the jar file with 
the 5 planets transits for those who are interested and trust me.

They have been extending JavaScript a lot. If Oracle is phasing out 
applets as I've heard, JavaScript will be even more important for the 
web that it is right now.

emf

-- 
Google's top Spherical Triangle Calculator search result!
https://files.nyu.edu/emf202/public/js/spherical.html

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Thread

Signing an applet emf <emfril@gmail.com> - 2013-12-13 08:40 -0500
  Re: Signing an applet Jeff Higgins <jeff@invalid.invalid> - 2013-12-13 09:52 -0500
    Re: Signing an applet emf <emfril@gmail.com> - 2013-12-13 10:12 -0500
      Re: Signing an applet Jeff Higgins <jeff@invalid.invalid> - 2013-12-13 10:30 -0500
      Re: Signing an applet Arne Vajhøj <arne@vajhoej.dk> - 2013-12-14 16:22 -0500
        Re: Signing an applet lipska the kat <"lipskathekat at yahoo dot co dot uk"> - 2013-12-14 21:24 +0000
  Re: Signing an applet lipska the kat <"lipskathekat at yahoo dot co dot uk"> - 2013-12-13 15:08 +0000
  Re: Signing an applet emf <emfril@gmail.com> - 2013-12-13 10:11 -0500
    Re: Signing an applet Jeff Higgins <jeff@invalid.invalid> - 2013-12-13 10:19 -0500
    Re: Signing an applet lipska the kat <"lipskathekat at yahoo dot co dot uk"> - 2013-12-13 15:27 +0000
      Re: Signing an applet emf <emfril@gmail.com> - 2013-12-13 11:08 -0500
    Re: Signing an applet Arne Vajhøj <arne@vajhoej.dk> - 2013-12-14 16:27 -0500
  Re: Signing an applet Wayne <nospam@all.invalid> - 2013-12-14 00:11 -0500
    Re: Signing an applet lipska the kat <"lipskathekat at yahoo dot co dot uk"> - 2013-12-14 11:41 +0000
      Re: Signing an applet Wayne <nospam@all.invalid> - 2013-12-15 22:22 -0500
    Re: Signing an applet Hiram Hunt <hiramhunt@verizon.net> - 2013-12-14 09:32 -0500
      Re: Signing an applet Hiram Hunt <hiramhunt@verizon.net> - 2013-12-14 09:39 -0500
        Re: Signing an applet Joerg Meier <joergmmeier@arcor.de> - 2013-12-14 15:48 +0100
    Re: Signing an applet emf <emfril@gmail.com> - 2013-12-15 00:04 -0500
      Re: Signing an applet Arne Vajhøj <arne@vajhoej.dk> - 2013-12-15 09:53 -0500
        Re: Signing an applet emf <emfril@gmail.com> - 2013-12-17 17:40 -0500
          Re: Signing an applet Arne Vajhøj <arne@vajhoej.dk> - 2013-12-17 18:08 -0500
            Re: Signing an applet Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2013-12-21 08:35 +0800
              Re: Signing an applet emf <emfril@gmail.com> - 2013-12-31 11:44 -0500
                Re: Signing an applet Arne Vajhøj <arne@vajhoej.dk> - 2014-01-04 20:14 -0500
              Re: Signing an applet Arne Vajhøj <arne@vajhoej.dk> - 2014-01-04 20:11 -0500
                Re: Signing an applet Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2014-01-06 08:04 +0800

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