Crypto newb: Need help with encrypting data for offline Swing app

Hi all,
I'm VERY new to cryptography. Can somebody point me in the right direction? I've created a Swing application that is intended to be used offline (no network connections are established by the app). I need to export XML files from this application, to be transported via floppy to another instance of the application on a different computer for import. The information is sensitive and must be encrypted!
I started looking into AES and using asymmetric ciphers (public/private key encryption). But then I realized that if Jane is exporting a file for Bob to view, she won't have access to Bob's public key (no network access). Ugghh!
I noticed another solution in this forum where the person suggested using password encryption. It was an old post and I think it used DES. Anyway, password encryption doesn't seem too secure.
So, I thought I'd create a symmetic key (correct term?) once, store it in the program directory, and distribute it with the application installer. That way, everyone would have the same key and would be able to encrypt/decrypt each others files. Right? Err... I'm not sure.
Like I said, I'm a newb at crypto. If someone could suggest the best/most secure way to accomplish this, I would be eternally grateful.
PLEASE HELP!!! :-D
Thanks in advance.

Sorry, Grant. I must've posted that last one just
after your response. I was intending the message to
be for Anand. Heh - you have no idea how many times I've done the same thing. It's an artifact of the asynchronous nature of message boards.
Your response is very helpful. Out of
curiosity, does my last post provide any more insight
that would change your mind? Or do you still believe
that using password encryption and letting the user
choose/provide the password is the best solution?Well, as you noted, giving everyone two sets of keypairs is semantically equivalent to giving everyone a single symmetric key. And, as I've noted, it's completely INsecure - everyone who gets access to an install disk, either legitimately or no, can read every transmission your app makes forever after. Cryptographically speaking, this is Not A Good Thing.
The advantage of PBE is that it's easy for your users to exchange keys when their machines can't see each other. The real key here is that your app, if you really want it to be secure, MUST allow/require that transmission between Alice and Bob use a different key than that between Alice and Carlos or Bob and Carlos - otherwise, if Eve compromises any user of your software, ALL users are compromised.
I'd go with PBE, just because other alternatives are painful for your end users. You could use generated KeyPairs, for example, if you provide a means for users to exchange public keys. If you display Bob's public key in encoded, String-able form, then Bob can either email that to Alice or read it off to her over the phone. Into your app Alice loads/types in that public key, and the app now knows how to secure communications with Bob.
Public keys are large, though, and people screw them up typing them in. And many users have TERRIBLE key discipline - if Bob loses access to his private key, he can't read anything Alice sends. And if his private key is readable on some public shared folder (which happens with a totally-frightening regularity), then we're back to no security at all.
Use one of the triple-DES PBE Ciphers, and get on with making your app do what you really want it to do, would be my advice. (Free advice, of course, being worth every penny you pay!)
Once again, thanks a bunch!Glad to help.
Grant

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Now my question is this: How can I restrict the user to only enter 'letters' (and spaces of course) but allow NO numbers for his/her surname??
Here is the programs code that I've written so far:
{code}
import java.io.*;
import java.util.*;
import java.text.*;
public class Project {
     private static String nameSurname = "";
     private static String num1 = null;
     private static String num2 = null;
     private static String choice1 = null;
     private static double answer = 0;
     private static String more;
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     public double Subtract() {
          answer = (Double.parseDouble(num1) - Double.parseDouble(num2));
          return answer;
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          answer = (Double.parseDouble(num1) * Double.parseDouble(num2));
          return answer;
     public double Divide() {
          answer = (Double.parseDouble(num1) / Double.parseDouble(num2));
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          answer = (Double.parseDouble(num1) % Double.parseDouble(num2));
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          answer = (Math.max(Double.parseDouble(num1), Double.parseDouble(num2)));
          return answer;
     public double minimumValue() {
          answer = (Math.min(Double.parseDouble(num1), Double.parseDouble(num2)));
          return answer;
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          answer = (Math.abs(Double.parseDouble(num1)));
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          answer = (Math.abs(Double.parseDouble(num2)));
          return answer;
     public double Squareroot1() {
          answer = (Math.sqrt(Double.parseDouble(num1)));
          return answer;
     public double Squareroot2() {
          answer = (Math.sqrt(Double.parseDouble(num2)));
          return answer;
     public static String octalEquivalent1() {
          int iNum1 = Integer.parseInt(num1);
String octal1 = Integer.toOctalString(iNum1);
return octal1;
     public static String octalEquivalent2() {
          int iNum2 = Integer.parseInt(num2);
          String octal2 = Integer.toOctalString(iNum2);
          return octal2;
     public static String hexadecimalEquivalent1() {
          int iNum1 = Integer.parseInt(num1);
          String hex1 = Integer.toHexString(iNum1);
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     public static String hexadecimalEquivalent2() {
          int iNum2 = Integer.parseInt(num2);
          String hex2 = Integer.toHexString(iNum2);
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          answer = Math.round(Double.parseDouble(num1));
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          answer = Math.round(Double.parseDouble(num2));
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          Date timeInD = timeIn;
          long timeOutD = System.currentTimeMillis();
          long msec = timeOutD - timeInD.getTime();
          float timeHours = msec / 1000;
               return (long) timeHours;
     DecimalFormat decimals = new DecimalFormat("#0.00");
     public String insertNameAndSurname() throws IOException{
          boolean inputCorrect = false;
               while (inputCorrect == false) {
                    while (nameSurname == null || nameSurname.length() == 0) {
                         for (int i = 0; i < nameSurname.length(); i++) {
                         if ((nameSurname.charAt(i) > 'a') && (nameSurname.charAt(i) < 'Z')){
                                   inputCorrect = true;
                    else{
                    inputCorrect = false;
                    break;
                    try {
                         BufferedReader inStream = new BufferedReader (new InputStreamReader(System.in));
                         System.out.print("Please enter your name and surname: ");
                         nameSurname = inStream.readLine();
                         inputCorrect = true;
                    }catch (IOException ex) {
                         System.out.println("You did not enter your name and surname, " + nameSurname + " is not a name, please enter your name and surname :");
                         inputCorrect = false;
                    System.out.println("\nA warm welcome " + nameSurname + " ,todays date is: " + format1.format(now));
                    System.out.println("and the time is now exactly " + format2.format(timeIn) + ".");
                    return nameSurname;
          public String inputNumber1() throws IOException {
          boolean inputCorrect = false;
               while (inputCorrect == false) {
                    try {
                         BufferedReader br = new BufferedReader (new InputStreamReader(System.in));
                         System.out.print("\nPlease enter a number you want to do a calculation with and hit <ENTER>: ");
                         num1 = br.readLine();
                         double number1 = Double.parseDouble(num1);
                         System.out.println("\nThe number you have entered is: " + number1);
                         inputCorrect = true;
                    } catch (NumberFormatException nfe) {
                         System.out.println("\nYou did not enter a valid number: " + "\""+ num1 + "\" is not a number!!");
                         inputCorrect = false;
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     public String calculatorChoice() throws IOException {
          System.out.println("Please select an option of what you would like to do with this number from the menu below and hit <ENTER>: ");
          System.out.println("\n*********************************************");
          System.out.println("---------------------------------------------");
          System.out.println("Please select an option from the list below: ");
          System.out.println("---------------------------------------------");
          System.out.println("1 - Add");
          System.out.println("2 - Subtract");
          System.out.println("3 - Multiply");
          System.out.println("4 - Divide (remainder included)");
          System.out.println("5 - Maximum and minimum value of two numbers");
          System.out.println("6 - Squareroot");
          System.out.println("7 - Absolute value of numbers");
          System.out.println("8 - Octal and Hexadecimal equivalent of numbers");
          System.out.println("9 - Round numbers");
          System.out.println("0 - Exit program");
          System.out.println("**********************************************");
          boolean inputCorrect = false;
               while (inputCorrect == false) {
                    try {
                         BufferedReader inStream = new BufferedReader (new InputStreamReader(System.in));
                         System.out.print("Please enter your option and hit <ENTER>: ");
                         choice1 = inStream.readLine();
                         int c1 = Integer.parseInt(choice1);
                         System.out.println("\nYou have entered choice number: " + c1);
                         inputCorrect = true;
                    } catch (NumberFormatException nfe) {
                         System.out.println("You did not enter a valid choice number: " + "\""+ choice1 + "\" is not in the list!!");
                         inputCorrect = false;
                    return choice1;
     public String inputNumber2() throws IOException {
          boolean inputCorrect = false;
               while (inputCorrect == false) {
                    try {
                         BufferedReader br2 = new BufferedReader (new InputStreamReader(System.in));
                         System.out.print("\nPlease enter another number you want to do the calculation with and hit <ENTER>: ");
                         num2 = br2.readLine();
                         double n2 = Double.parseDouble(num2);
                         System.out.println("\nThe second number you have entered is: " + n2);
                         System.out.println("\nYour numbers are: " + num1 + " and " + num2);
                         inputCorrect = true;
                    } catch (NumberFormatException nfe) {
                         System.out.println("You did not enter a valid number: " + "\""+ num2 + "\" is not a number!!");
                         inputCorrect = false;
                    return num2;
     public int Calculator() {
          int choice2 = (int) Double.parseDouble(choice1);
          switch (choice2) {
                    case 1 :
                         Add();
                         System.out.print("The answer of " + num1 + " + " + num2 + " is: " + decimals.format(answer));
                         break;
                    case 2 :
                         Subtract();
                         System.out.print("The answer of " + num1 + " - " + num2 + " is: " + decimals.format(answer));
                         break;
                    case 3 :
                         Multiply();
                         System.out.print("The answer of " + num1 + " * " + num2 + " is: " + decimals.format(answer));
                         break;
                    case 4 :
                         Divide();
                         System.out.print("The answer of " + num1 + " / " + num2 + " is: " + decimals.format(answer));
                         Modulus();
                         System.out.print(" and the remainder is " + decimals.format(answer));
                         break;
                    case 5 :
                         maximumValue();
                         System.out.println("The maximum number between the numbers " + num1 + " and " + num2 + " is: " + decimals.format(answer));
                         minimumValue();
                         System.out.println("The minimum number between the numbers " + num1 + " and " + num2 + " is: " + decimals.format(answer));
                         break;
                    case 6 :
                         Squareroot1();
                         System.out.println("The squareroot of value " + num1 + " is: " + decimals.format(answer));
                         Squareroot2();
                         System.out.println("The squareroot of value " + num2 + " is: " + decimals.format(answer));
                         break;
                    case 7 :
                         absoluteNumber1();
                         System.out.println("The absolute number of " + num1 + " is: " + decimals.format(answer));
                         absoluteNumber2();
                         System.out.println("The absolute number of " + num2 + " is: " + decimals.format(answer));
                         break;
                    case 8 :
                         octalEquivalent1();
                         System.out.println("The octal equivalent of " + num1 + " is: " + octalEquivalent1());
                         octalEquivalent2();
                         System.out.println("The octal equivalent of " + num2 + " is: " + octalEquivalent2());
                         hexadecimalEquivalent1();
                         System.out.println("\nThe hexadecimal equivalent of " + num1 + " is: " + hexadecimalEquivalent1());
                         hexadecimalEquivalent2();
                         System.out.println("The hexadecimal equivalent of " + num2 + " is: " + hexadecimalEquivalent2());
                         break;
                    case 9 :
                         Round1();
                         System.out.println("The rounded number of " + num1 + " is: " + decimals.format(answer));
                         Round2();
                         System.out.println("The rounded number of " + num2 + " is: " + decimals.format(answer));
                         break;
                    case 0 :
                         if (choice2 == 0) {
                              System.exit(1);
                         break;
               return choice2;
          public String anotherCalculation() throws IOException {
               boolean inputCorrect = false;
               while (inputCorrect == false) {
                         try {
                              BufferedReader br3 = new BufferedReader (new InputStreamReader(System.in));
                              System.out.print("\nWould you like to do another calculation? Y/N ");
                              more = br3.readLine();
                              String s1 = "y";
                              String s2 = "Y";
                              if (more.equals(s1) || more.equals(s2)) {
                                   inputCorrect = true;
                                   while (inputCorrect = true){
                                        inputNumber1();
                                        System.out.println("");
                                        calculatorChoice();
                                        System.out.println("");
                                        inputNumber2();
                                        System.out.println("");
                                        Calculator();
                                        System.out.println("");
                                        anotherCalculation();
                                        System.out.println("");
                                        inputCorrect = true;
                              } else {
                                   System.out.println("\n" + nameSurname + " thank you for using this program, you have used this program for: " + decimals.format(programRuntime()) + " seconds");
                                   System.out.println("the program will now exit, Goodbye.");
                                   System.exit(0);
                         } catch (IOException ex){
                              System.out.println("You did not enter a valid answer: " + "\""+ more + "\" is not in the list!!");
                              inputCorrect = false;
          return more;
     public static void main(String[] args) throws IOException {
          Project p1 = new Project();
          p1.insertNameAndSurname();
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          p1.inputNumber1();
          System.out.println("");
          p1.calculatorChoice();
          System.out.println("");
          p1.inputNumber2();
          System.out.println("");
          p1.Calculator();
               System.out.println("");
               p1.anotherCalculation();
               System.out.println("");
{code}
*Can you please run my code for yourself and have a look at how this program is constructed*
*and give me ANY feedback on how I can better this code(program) or if I've done anything wrong from your point of view.*
Your help will be much appreciated.
Thanks in advance

Smirre wrote:
Now my question is this: How can I restrict the user to only enter 'letters' (and spaces of course) but allow NO numbers for his/her surname??You cannot restrict the user. It is a sad fact in programming that the worst bug always sits in front of the Computer.
What you could do is checking the input string for numbers. If it contains numbers, just reprompt for the Name.
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Need performance! - Need help with Server Architecture for SSAS on Azure VM

I would like to build 100% Azure VM base solution. We can install as many as needed.
I have large amount data in DW. (100GB-1000GB)
I would like to provide PowerView reports in SharePoints.
I would like to have report data be as real time as possible. (Min data is updated once in 2 hours)
These are requirements:
-SharePoint 2013
-PowerView
-SSAS OLAP Cube
-SQL Server DW&Staging DB (Currently DW&Staging on same server)
I need help specially what can be done with SSAS to meet requirements? Should be installed to own application server? Possible to install multiple SSAS? SSRS needs own server?
I appreciate also links to server topology diagrams.
Kenny_I

I assume you mean 100GB-1000GB (not 1000TB) right?
For Sharepoint I would refer to the sizing guide for diagrams and sizing:
http://technet.microsoft.com/en-us/library/ff758647(v=office.15).aspx
SSRS (and Power View) will run in the SharePoint farm on a SharePoint app server potentially with other SharePoint services.
I would definitely put SSAS on a dedicated server for a cube that size. Depending on how well your data compresses, there may not be a VM in Azure with enough RAM to put your model into a Tabular SSAS model. I would prototype it with a subset of data to see
how well it compresses. You can always use a Multidimensional model as a fallback.
Depending on how much processing the SSAS model impacts user queries (since it is happening during the day) you could build an SSAS processing server and a separate SSAS query server and run the XMLA Synchronize command to copy the cube incrementally from processing
to query servers.
Does that help?
http://artisconsulting.com/Blogs/GregGalloway

Newbie needs help with MS exchange / MS Push email

I just got an iPhone 3G a few days ago. Heretofore, all my experience has been with HTC, Motorola and Blackberry phones. As a non-technical person trying to make Pust work through my network is very confusing.
I read the instructions / bulletins and finally made email and calendar work (sort of). It only works on WiFi and then I have to manually update mail as it does not always Push.
Does the iPhone Push setup only work with Server 2003 / Push via WiFi? If not, can anyone give me step by step instructions on how to make it work with 3G and no WiFi?
If possible, please be specific as I am a newbie trying to make this work for my small company.
If I can't find a solution I'll have to get rid of this and go back to something that works.
It seems that Apple is making it very difficult to set this phone up for Push application
Thanks,
Gary

The iPhone works fine over cellular. You did mention a certificate - I am going to guess that this may be the issue.
If you open Safari on the iPhone and connect to your OWA, do you get a warning? When you viewed the cert in IE, is it self-signed? If so you need to get it on the iPhone. The easiest way is to set up gmail or something similar on iPhone and email it to yourself.
when it come in email your iPhone will immediately recognize it as a file that you can import it. Select it and import it, then you should be able to connect to your Outside Exchange server.

Need help with correction inscript for duplication on regular basis

Hi,
I am using Oracle 10.2.0.4 on Win 2008 R2. We have Archive mode enabled and no rman catalog is used. I have a requirement where i have to duplicate prod sevrer on regular basis to development server.
I have created few batch files so that the entire process in automated. Stored all the scripts in c:\script\clone\ directory.+
I have taken the backup copy of password and spfile from prod server and copied to the development server in same location.
These are the scripts i run in order:
*1_clone.bat*
set ORACLE_SID=orcl
sqlplus / as sysdba @c:\script\clone\2_test.bat
*2_test.bat*
shutdown immediate
startup nomount
host rman target sys/oracle@live nocatalog auxiliary / @c:\script\clone\3_rman.rcv
*3_rman.rcv*
run {
allocate auxiliary channel d1 type disk;
duplicate target database to ORCL NOFILENAMECHECK;
exit
When the duplication process in about to finish, i get below error:
contents of memory script:
shutdown clone;
startup clone nomount;
executing Memory Script
RMAN-03002: failure of duplicate DB command at 07/31/2012 08:02:21
RMAN-03015: error occured in stored script memory script
RMAN-06136: Oracle error from auxiliary database: ORA-01013: user requested cancel of current operation
Recovery Manager complete
SQL>
When i press exit, this window closes and i can run the alter database open resetlogs;+ command from a new sql prompt. I check online and some suggest there might be a window open with system user connected. Please suggest any changes in the script.
Best Regards,

Hello;
Having another session with system user will cause rman to throw this error. For example another session used to start up database in nomount mode still being active.
Duriing the cloning process the rman session needs to be exclusively connected to the auxiliary instance (no other session are allowed).
Duplicate post
request for help with rman cloning script
Best Regards
mseberg
Edited by: mseberg on Jul 31, 2012 5:02 AM

Not exactly iweb - need help with a graphic for my site

This doesn't fit anywhere so dumping it here. I drew by hand a graphic I want to use with iweb to put on my site as my site's logo. Main problem is that getting the background transparent isn't working well as when it was scanned the scanner didn't back the background "pure" white. I have tried adjusting the whitepoint and setting the color depth down, but still no good. I don't know a ton about graphic program use. I have an older copy of graphic converter that came on this powerbook when i got it. I would be fine having the graphic loose the marker look and have solid fill colors - just I am not good enough with computer drawing tools to do it on the computer! So I either need to get a volunteer to help me out, or some help with some detailed instructions to get this to work out... (also I am broke so no cost/shareware is only option here)
many thanks!!!!
I can get you a scanned jpg of the pic if needed.

THANK YOU/___sbsstatic___/migration-images/migration-img-not-avail.png so the tolerance makes it not care so much about the gradations in color? what else is tolerence good for?
I have a cleaner copy now after someone suggested GIMP, so played with it last night - though couldn't figure out transparency - that was clear on converter- just not cooperative till these wonderful directions.
So now I know how to do it without messing with the pic, and with messing with it - both good lessons and got a bit brighter color out of the deal.
many thanks for the straightforward and clear directions, they worked perfectly/___sbsstatic___/migration-images/migration-img-not-avail.png extra strars for you/___sbsstatic___/migration-images/migration-img-not-avail.png

Storm user newbie needs help with appcenter

hi everyone. i need help regarding my blackbeery storm 9500. i bought from a friend but he only gave the charger and the the phone. there is no app center. is there anyway i could get the appcenter so that i can get the bbmessenger?

You can download BBMessenger from your Blackberry browser at www.blackberry.com/bbm
AppWorld: www.blackberry.com/appword
You must have the BlackBerry Data Plan on your device to use either of those services.
1. If any post helps you please click the below the post(s) that helped you.
2. Please resolve your thread by marking the post "Solution?" which solved it for you!
3. Install free BlackBerry Protect today for backups of contacts and data.
4. Guide to Unlocking your BlackBerry & Unlock Codes
Join our BBM Channels (Beta)
BlackBerry Support Forums Channel
PIN: C0001B7B4 Display/Scan Bar Code
Knowledge Base Updates
PIN: C0005A9AA Display/Scan Bar Code

MSI P67A-C45 (B3) Newb needs Help with connections..

Hi all..
First time posting here, but have been in the shadows for quite a while..
Anyway, i decided to finally take the plunge, and build my own PC, and now i'm beginning to hit a few bumps.
I have a couple of questions that i would like some help with, if possible to reassure myself i may be in the right direction..
I bought THIS PSU and was hoping someone could tell me where the Blue connectors (one labelled CP and one labelled U1) Connect to?
Is it into JPWR2? And does it/do they only connect in the correct way? (Do i remove the plastic cap and attach both?
and i bought THIS VIDEO/GRAPHICS CARD and i'm guessing the RED "PCI express" and "SLI ready" connect to that somehow (Haven't opened box yet for card)
Again, wondering is there a certain way for them to connect.
Also, from my chassis, the "AC '97" and "HDA" connectors go to JAUD (I guess), does it matter which one? (I currently have "HDA" connected)
I have i5 2500k already on board. (If that makes a difference).

Quote from: Ben_Cartwright on 26-May-11, 22:05:35
Do the Audio plugs go into JAUD? and does it matter which one?
Yep, connect the front panel audio to the JAUD. If you need the pin layout, it says in the manual. I would say the HDA connector is the one to connect.
Quote from: Ben_Cartwright on 26-May-11, 22:05:35
Any recommendations for testing it all, before i plug it in, and press the power?
Should i (Can i) test individual parts first?
Thanks again.
Check all power connections, seating of the RAM and add-on cards, check the HSF is plugged into the fan header, and obvious things like that.
As for testing, enter the BIOS and make sure the CPU isn't running too hot. Set up the RAM with the required timings and voltage, and test with >>Memtest86<< for several hours. No point starting the Windows installation if say your RAM has errors, since it will corrupt files during the install, if it installs at all.

Crypto newb: Need help with encrypting data for offline Swing app

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