How to get verified digital signature for applets?

Hi All,
I run a small website with an applet ( [http://www.tozsdeasz.hu/grafikonrajzolo/inditas.html|http://www.tozsdeasz.hu/grafikonrajzolo/inditas.html] ). Visitors can load files into the applet, so the applet needs to ask for permission from the user to access files on the visitor's computer. When doing so an unfriendly window pops up telling that the digital signature of the application cannot be verified (you can see it for yourself by the link). Some users keep complaining about it fearing of the security risk.
What is the proper way of getting a properly signed applet? (how to get a verified digital signature?)
Please help me!
Best wishes:
Szabolcs Kelemen

Thanks for the links.
As far as I saw in the documents I need a "digital certification authority" to sign the jar.
Do you know any of these authorities that is free? The entire application does not worth much, I can't afford expensive certifications.
Best regards:
Szabolcs Kelemen

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l_signature_b64 varchar2(200);
l_signature_b64_alter_back varchar2(200);
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l_response varchar2(32000);
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n_actual_length number;
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json_loc json;
l_lat VARCHAR2(40);
l_lng VARCHAR2(40);
l_status VARCHAR2(255);
json_accuracy json;
--temp_string varchar2(10000);
n_first_comma number;
n_second_comma number;
n_level_length number;
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l_address := replace(l_address,' ','+');
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dbms_output.put_line(l_path);
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l_signature_b64_alter_back:=translate(l_signature_b64,'+/','-_');
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l_url:=l_Google_service_domain||l_path||'&client='||l_client_name||'&signature='||l_signature_b64_alter_back;
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dbms_output.put_line(n_actual_length);
dbms_output.put_line(l_response);
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json_obj:=new json(l_response);
l_status := json_ext.get_string(json_obj, 'status');
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json_loc := json_ext.get_json(json_geom_obj, 'location');
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l_lng := to_char(json_ext.get_number(json_loc, 'lng'));
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when 'ROOFTOP' then P_n_accuracy:=9;
when 'RANGE_INTERPOLATED' then P_n_accuracy:=7;
when 'GEOMETRIC_CENTER' then P_n_accuracy:=5;
else P_n_accuracy:=3;
end case;
P_b_success:=true;
else
P_b_success:=false;
P_n_accuracy:=0;
P_s_Geocoding:='0,0';
end if;
END;

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**Click the KUDOS thumb up on the left to say 'Thanks'**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

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