Simple encryption question

i have a very simple user authentication system, where user info is stored in a flat text file on the server. I want to encrypt the password so that it's not stored in plain text, but I can't understand any of the tutorials about security and encryption...is there any way that I can just use a class (or a few) to encrypt the password in the file, then encrypt submitted passwords & check if they match (rather than dealing wiht public and private keys and all that jazz)
thanks a lot
Laz

Instead of encrypting the password you should calculate message digest (i.e. MD5 or SHA).
java.security.MessageDigest md = java.security.MessageDigest.getInstance("SHA");
md.update( password.getBytes());
byte[] digest = md.digest();

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Simple/silly question: how do I set/change default font/color for outgoing mail messages?

Simple/silly question: how do I set/change default font/color for outgoing mail messages?

Just a suggestion..........
Download Thunderbird. Easier to use when it comes to what you want to do w/your emails.

4 Simple Flash Questions that Are Stumping Me!

What is the Frame Rate for Web Animations
Q1. I am making an animation which will be played on the web. What is the default frame rate (fps) of Flash CS5? And what is the frame rate of for web?
Q2. My animation needs to be 30 seconds long. So at 15 fps that would mean I need to use 600 frames in Flash?
How Do I Mask everything so all I see is the Content on the Stage?
I have a wide image that extends past my movies stage size so when I preview my movie the image is visible. How do I mask out anything that extends past my movies window size? I believe I can create a layer named "mask" and place it above all other layers, but I forget how to make the mask. Any help is appreciated.
How to Fade a Graphic
I have a graphic element (some type) and I want it to fade from 0% to 100%. In older versions of Flash I could just select the symbol and then set it's alpha value to 0%, move a few keyframes and then set the alpha to 100%. Voila! but now it doesn't seem to work that way. How can I do this in CS5?

Ned, it says 24 fps which means there is 24 frames per second so each 24 frames is 1 second.
Date: Fri, 4 Nov 2011 05:35:16 -0600
From: [email protected]
To: [email protected]
Subject: 4 Simple Flash Questions that Are Stumping Me!
    Re: 4 Simple Flash Questions that Are Stumping Me!
    created by Ned Murphy in Flash Pro - General - View the full discussion
1 You can create your character as a movieclip and copy/paste that movieclip from one file to another. 2. One way to create a movieclip is to copy all the frame of the animation's timeline (select them all, right click the selection, choose Copy Frames), then create a new movieclip symbol (Insert -> New Symbol...etc) right click on its only keyframe and chhose Paste Frames. THat will put all the layers and frames you copied into the movieclip The only way to come close to being certain about the timing of you animation is to use code to keep track of the time, something like getTimer().. The frame rate that a file plays at is not a reliable means of dictating the time it takes due to a variety of factors which include the amount of content you are trying to process and performance limits of the user's machine.
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Simple performance question

Simple performance question. the simplest way possible, assume
I have a int[][][][][] matrix, and a boolean add. The array is several dimensions long.
When add is true, I must add a constant value to each element in the array.
When add is false, I must subtract a constant value to each element in the array.
Assume this is very hot code, i.e. it is called very often. How expensive is the condition checking? I present the two scenarios.
private void process(){
for (int i=0;i<dimension1;i++)
for (int ii=0;ii<dimension1;ii++)
for (int iii=0;iii<dimension1;iii++)
    for (int iiii=0;iiii<dimension1;iiii++)
         if (add)
         matrix[i][ii][iii][...] += constant;
         else
         matrix[i][ii][iii][...] -= constant;
private void process(){
if (add)
for (int i=0;i<dimension1;i++)
for (int ii=0;ii<dimension1;ii++)
for (int iii=0;iii<dimension1;iii++)
    for (int iiii=0;iiii<dimension1;iiii++)
         matrix[i][ii][iii][...] += constant;
else
for (int i=0;i<dimension1;i++)
for (int ii=0;ii<dimension1;ii++)
for (int iii=0;iii<dimension1;iii++)
    for (int iiii=0;iiii<dimension1;iiii++)
       matrix[i][ii][iii][...] -= constant;
}Is the second scenario worth a significant performance boost? Without understanding how the compilers generates executable code, it seems that in the first case, n^d conditions are checked, whereas in the second, only 1. It is however, less elegant, but I am willing to do it for a significant improvement.

erjoalgo wrote:
I guess my real question is, will the compiler optimize the condition check out when it realizes the boolean value will not change through these iterations, and if it does not, is it worth doing that micro optimization?Almost certainly not; the main reason being that
matrix[i][ii][iii][...] +/-= constantis liable to take many times longer than the condition check, and you can't avoid it. That said, Mel's suggestion is probably the best.
but I will follow amickr advice and not worry about it.Good idea. Saves you getting flamed with all the quotes about premature optimization.
Winston

Simple encryption method

Hey i am trying to create a simple encryption. This is my function.
public static String Crypt(String sData)
byte[] bytes = sData.getBytes();
for(int i=0; i<bytes.length; i++)
bytes[i] ^= 477;
return (new String(bytes));
Unfortunately the String that is returned has a lot of "???????" in it. I have also tried char arrays but to no effect. I want to be able to send the data using a socket therefore i need it in a char array or string. Can anyone help please?

>
return (new String(bytes));
Unfortunately the String that is returned has a lot of
"???????" in it. I have also tried char arrays but to
no effect. I want to be able to send the data using a
socket therefore i need it in a char array or string.1) Not all byte and byte combinations produce a valid String object so one cannot use 'new String(bytes)' with the certainty of being able to reverse the operation and get back the original bytes. i.e.
new String(some bytes).getBytes() usually does not return 'some bytes'.
2) You don't need to have a char array or string to send bytes down a Socket. Just send down the encrypted bytes.
3) I hope you are not considering this encryption method for an industrial strength application!

Simple encryption algorithm

Hi there,
Where can i find a very simple encryption algorithm to allow me to encrypt basic strings?
It should be simple enough so i can make a version for Java and Cobol.
Thanks for any help.

I guess you can implement any encryption algorithm with either language. XOR should suffice... just not ROT13, it'll be a pain with EBCDIC. XOR each byte with some byte you randomly picked.

A few simple Logic questions...please help.

I have a few probably simple Logic questions, that are nonetheless frustrating me, wondering if someone could help me out.
1. I run Logic 8, all of the sounds that came with logic seem to work except organ sounds. I can't trigger any organ sounds (MIDI) on Logic, they won't play. I have a Yamaha Motif as my midi controller.
Any idea why?
2. I've starting running into a situation where I will record a MIDI track, the notes are recorded but they won't playback. The only track effected is the one that was just recorded. All other midi tracks playback.
I have to cut the track, usually go out of Logic and back in, re record for it to playback properly. Any idea why this may be happening?
3. How important is it to update to Logic 9. Are there any disadvantages down the road if I don't upgrade. If I purchase the $200 upgrade, do I get a package of discs and material, or it just a web download.
Any help is appreciated!
Colin

seeren wrote:
Data Stream Studio wrote:
3) You get a full set of disks and manuals.
They're including manuals now?
I think his referring to the booklets ...on how to install etc
It would be great to see printed manuals though ...I love books especially Logic/Audio related !!
A

Simple Quick Question

wrong section, post was moved.
Message was edited by:
Rob17

you titled "simple quick question"...
.. complicated to answer..
a) the TermsOfUse of the iTS don't allow any processing of purchased files, these are "copy protected"..
b) iM has a voice-over function..
c) iM is a video-edit app.. easy to use... just learn to handle it...
d) iM allows to "extract" audio (=muting the original audio, adding your own..)
e) to learn iM, spend some time here: http://www.apple.com/ilife/tutorials/imovie/index.html
f) use pencil and paper first! WRITE and scribble, what shall happen when in your movie/parody... make a script, draw a storyboard .. THEN launch iM.. in other words: think first, then edit.. iM is just a tool, it does not "create"... Picasso needed a papertowel and half a stencil to create art....
g) to get comfortable with iM, start with your own, small, short (3min!) project... import some stills, edit them, add a funny voice-over, add sounds, add music... good? make a bigger one...
h) .. in our Lecture II, we teach you how to import shows from TV, youtube, wherever..
standard disclaimer:
be nice to ©opyrights ...

SAP 4.7 Encryption questions

Dear SAP on i5 community,
We are running SAP 4.7 and i5 OS 5.3.0 and have the following questions about how encryption works;
Encryption questions
1. How do we determine precisely what encryption algorithm is used to encrypt credit card data in our R/3 system?
2. How are the encryption keys for this algorithm generated or provided?
3. How and where are encryption keys for this algorithm are managed?
4. Is there a way to change the encryption keys?
We look forward to your replies...Thank you!
TMM

Hello Tim,
You could take a look at the following blog and the Notes refered.
Enable Credit Card Encryption
If I am not mistaken...
1. Decided by SAP already
2. You generate the keys through SAP transactions (details in Notes and blog)
3. Keys are saved in a file on the OS level (make sure it is safe)
4. Yes, you can. But all the previous credit cards will be lost.
Hope it helps.
Best regards,
Victor

Simple query question

hi all,
I have a XMLType table with one column - I have presently one row, in my column xmlsitedata I have stored one large xml file.The schema definition is given below:
<?xml version="1.0" encoding="UTF-8" ?>
- <xs:schema elementFormDefault="qualified" attributeFormDefault="unqualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
- <xs:element name="siteList">
- <xs:complexType>
- <xs:sequence>
<xs:element name="site" type="siteType" minOccurs="0" maxOccurs="unbounded" />
</xs:sequence>
</xs:complexType>
</xs:element>
- <xs:complexType name="siteType">
- <xs:sequence>
<xs:element name="nameEn" type="xs:string" />
<xs:element name="nameFr" type="xs:string" />
</xs:sequence>
<xs:attribute name="code" type="xs:string" />
</xs:complexType>
</xs:schema>
I have executed the query below:
select x.XMLSITEDATA.extract('/siteList/site/nameEn/text()').getCLOBVal() "stName" from wsitelist x;
and I get all english names of some 200 locations, however, there is 1 row selected and all names show up on one row. How do I split them into 200 or whatever rows?
Thanks,
Kowalsky

Have a look at the answer provided in the following thread.
very simple XML question
This may solve your problem.
use xmlsequence.
Alvinder

Simple Encryption and Simple Question

Anyway, I hope it is simple!
This is from an example in my text book, I have coded it up and it works great. I think I understand everything except for the subtraction of 'A' in the encryptMessage method. Any ideas? I thought it may be subtracting the ASCII value of 'A', but isn't that just 1?
Any help is appreciated.
public class CeasarCryptography
     public static final int ALPHASIZE = 26; //Standard English alphabet size, ALL uppercase
     public static char[] alpha = {'A','C','B','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
     protected char[] encryptionKey = new char[ALPHASIZE];
     protected char[] decryptionKey = new char[ALPHASIZE];
     public CeasarCryptography()
               //Initializes encryptionArray
               for (int x = 0; x < encryptionKey.length; x++)
                         encryptionKey[x] = alpha[ (x + 3) % ALPHASIZE ]; //Rotate alphabet by three places
               //Initializes encryptionArray and decryptionArray
               for (int x = 0; x < decryptionKey.length; x++)
                         decryptionKey[encryptionKey[x] - 'A'] = alpha[x]; //Decypt is revers of encrypt
     public String encryptMessage(String secret)
               char[] mess = secret.toCharArray(); //First, place the string in an array
               for (int x = 0; x < mess.length; x++)
                         if (Character.isUpperCase(mess[x]))
                                   mess[x] = encryptionKey[mess[x] - 'A'];
               return new String(mess);
     public String decryptMessage(String secret)
               char[] mess = secret.toCharArray();
               for (int x = 0; x < mess.length; x++)
                         if (Character.isUpperCase(mess[x]))
                                   mess[x] = decryptionKey[mess[x] - 'A'];
               return new String(mess);
     public static void main(String[] args)
               CeasarCryptography cipherObject = new CeasarCryptography();
               System.out.println("Welcome to the oldest known enryption program.");
               System.out.println("\tEncryption Key: " + new String(cipherObject.encryptionKey));
               System.out.println("\tDecryption Key: " + new String(cipherObject.decryptionKey));
               String testString = "JAVA IS NOT EASY";
               System.out.println("\nEncrypt the following: " + testString);
               System.out.println("\tOnce encrypted: " + cipherObject.decryptMessage(testString));
}

If the value of 'A' is not important, how is 'D' -
'A' 3? Because D is 3 later than A. So whether 'A' is -123 or 0 or 1 or 65, 'A' + 3 is always 'D'.
Or is this D (which is the 4th letter) minus A
(which is the 1st letter) for 4-1 = 3. Right. It's just that in ASCII, 'A' is 65, instead of 1 or 0 that we usually think of it. The whole minus 'A' part is just to say "how far away from A are we, and therfore how much are we shifting?"
And 3 is the
element in the Array that D is in?I was winging it here but that's what it comes down to. Whether it's an index into an array where 'A' is in 0, 'B' is in '1', etc., or just an on-the-fly shifting, either way, "minus 'A'" ultimately means "How far away from A is this letter?"

Simple Report Question

Post Author: scott123
CA Forum: General
I want to take the information in a simple excel table and recreate it 3 times, each time sorting/grouping on a different columnHere is the tableAnd here is the report that I'm trying to generate (first sorted by name, alphabetically, then grouped by rank, then grouped by size) I'm comfortable working with excel tables in Crystal, but I'm running into a problem repeating the information and then sorting each group separately. I also have no problem doing each group in a single report (without repeating any records), but I'd like to include all 3 groups in a single report. My apologies for how remedial this question is- I thought for sure that Crystal could do this easily but I've spent a couple of days on this and am running into a brick wall.

Post Author: pandabear
CA Forum: General
That's right Scott, and maybe make them "on demand"
sub reports so the user only has to see the data they
really want at the moment. Gives the report a nice clean look too.
PB

A simple security question

I'm trying to write a simple self-signed applet that use a jca provider but thi exception "java.security.SecurityPermission putProviderProperty.BC" is thrown. if I use a policy file, it works fine but for a beginner user is not very useful intall a new policy file.
After this I tried to write a new self-signed applet that read a file and open a ServerSocket on port 21, and it work fine without a new policy file!
My question is this: why is needed a policy file to add a provider and not to open a ServerSoket or read/write a file???????
PS
if u have an idea to resolve my problem without a policy file, tell me pls!!! IT'S URGENT!!

An applet works out of a so-called sandbox. The security restrictions can be overcome in one of two ways that you have tried:
1) by the use of a policy file, or
2) by signing the applet
So, to answer your question:
My question is this: why is needed a policy file to add a provider and not to open a ServerSoket or read/write a file???????Since the applet is signed, there is no need for a policy file......if you tried to access the socket without signing the applet, you'll get the security exception!
;o)
V.V.

A somewhat simple security question......

If a mac running macosx has two separate user accounts, lets say one admin and the other a standard user, or both admins or both standard users.....
Is it possible for a hacked/penetrated account on one of the users to affect or read any info from the other user on the same machine ?
What application is in question; Safari lets say.....

FLUIDNYC wrote:
So, disable all scripts and uninstall all plugins from the browser.
No java, No javascript, No plugins like flash, java, shockwave, quicktime, or adobe crap.
So, no functionality. What about that java applet I need to run 10 hours a day. Do you think I should go out of business over it? Or all my QT movies? Or, deprive myself of Flash, so I can't view the content of websites?
So, lets say you browse www.thissiteisinfected.com and have everything uninstalled (see above), and your smart enough to browse the web using a "STANDARD" user account and not the "ADMIN" user account.
Running from a standard user buys you nothing and adds additional steps. If you want to download an app, before you install, you will get a dialog warn you "XXXX is an application you downloaded from the internet..." So, you still have to authenticate. And what about *all the apps that need no authentication to install?*
You tell me how this website will inject crap into your MAC with the settings above???
There is no way to FORCE CODE into your browser if everything is disabled.
Tell me how it can "inject crap" into my "Mac" admin without my complicity.
I have bumped into a rouge antivirus website while on my macbook using safari.
All of a sudden a popup stated i had spyware, i could'nt close the box/window, I had to do a FORCE QUIT on SAFARI to get out of that page. It pretty much hijacked SAFARI.
This is nothing that can harm you. It is annoying having to force quit over it, but that is all.
My safari download settings place things on my desktop, sure enuff, there was a .EXE file sitting on my macbooks desktop.
Sure enough, your Mac can't do a thing with it.
NOTHING IS BULLETPROOF.
I agree but there are simpler ways to plant a rootkit you overlook, that have nothing to do admin accounts or ports. *The question is, who would want to?* Even if a black hat is randomly hunting for bank account numbers, social security numbers, credit card numbers, etc. he would pass up a UNIX based system with good protections in place for an easier target.
In short, in a home environment, I could never recommend running from a standard user. Especially if they are on a router and/or using OS X firewall. (The exception being if you have kids and want to use parental controls.) I have no idea how this mantra about using a non-admin account started, there is no place where Apple recommends this.
-mj

Simple Query Question - How do I return the Last 3 records of a Table?

Question.
For example, I have a table that has 50 records.
How do I, specify in SQL to only return the last 3 records of the table.
Select a.* from table a where ????

I was just trying to show an example to a friend on
how something like this would work and if it was even possible. But it won't work. Here's a simple example:
SQL> create table emp
2 (id)
3 as
4 select object_id
5 from   all_objects
6 order by object_id;
Table created.
SQL> select *
2 from (select rownum rn
3               ,b.*
4         from   emp b)
5 where rn > ( select (max(rownum) - 3)
6                from    emp)
7 ;
        RN         ID
     40830      55891
     40831      55892
     40832      55893So far, so good. These are the "last 3" rows inserted. Now delete a bunch of rows and insert 3 new ones:
SQL> delete emp where id < 40000;
33423 rows deleted.
SQL> commit;
Commit complete.
SQL> insert into emp values (60000);
1 row created.
SQL> insert into emp values (60001);
1 row created.
SQL> insert into emp values (60002);
1 row created.
SQL> commit;
Commit complete.
SQL> select *
2 from (select rownum rn
3               ,b.*
4         from   emp b)
5 where rn > ( select (max(rownum) - 3)
6                from    emp)
7 ;
        RN         ID
      7410      55891
      7411      55892
      7412      55893Here's the problem. Even though the "last 3 rows" are 60000 - 60002, I still get the same ones as the first query.

Simple encryption question

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