"Scrambling" an integer on the fly: what's it called?

I want to scramble "on the fly" integers (between 0 and 100,000) into some 15-byte Strings or 15-byte numbers (or shorter).
I have no doubt that I could come up with a simple mathematical algorithm, but surely this method must exist already in some library. Because I don't know how to call what I am looking for, I have so far failed to find what I wanted.
Does anyone have references?
Or even just the "official" name of that kind of method would help me in my research!
Criteria:
* it has to be VERY fast, both to scramble and to unscramble.
* it doesn't have to be top level of security
(Background: the original integers are reference IDs and they come as a sequence: ..., 542, 543, 544, ... It's important to prevent someone from gathering the objects sequentially, thus it's important to break any apparent logical continuity in the sequence.)
Message was edited by:
30goldbe

Since you need to be able to invert the value and get
back the original it is called 'encryption'! IThat's why I posted in this forum! ;)
I would be tempted to do the following (but I was hoping there was a faster method):
Let N be the original integer. Let p be a large prime number (around 10 million). Let q be a small integer greater than 1, prime with respect to (p-1).
public Long firstScramble (Long N) {
return (N^q) % p;
}I could then use the hexadecimal version of the result which would result in the desired string. To unscramble, it's just a matter of finding the integer r such that (r*q) % (p-1) = 1...
(It would be possible to speed the above calculation with a for loop...)
Is there a faster method in one of the cryptography packages?
Message was edited by:
30goldbe
Message was edited by:
30goldbe

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How to change the frequency of pulse train on the fly using an array of values?

Hi all!
First I want to thank U for the great job you are doing for this forum.
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Can someone please built a good example for me? Your help will be appreciated.
Regards
Chris
Attachments:
number_of_steps.txt ‏17 KB
frequency.txt ‏15 KB

Tiano,
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[CODE]
<mx:VBox width="100%" height="100%"
horizontalAlign="center">
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[/CODE]
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[CODE]
[Bindable]
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{item:"myDashboarComp"}
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percentHeight:100, children:[
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{item:"myDashboarComp"},
{item:"myDashboarComp"}
[/CODE]
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First of all I was unsure of the best way to loop through the
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i.e. the first 3 "myDashboarComp's" are added to the >
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[CODE]
private function initApp():void
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[/CODE]
in the above actionScript the canvas "dashboardCanvas" is
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I just need pointing in the right direction and some ideas on
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Kind Regards,
Jon.

There are several ways to do this. The third chapter in the
cookbook is a good place to start.
All things in ActionScript are based on objects. Constructing
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then binding that data to your dashboard objects is basically what
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For me it makes the most sence to have an idea of what
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It sounds like you need to organize your layout structure in
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Without a bit more information as to what you are
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Hope that helps some.
-D

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2. I create the Push Button and when user click it will popup the LOV.
DECLARE
     rg_id RecordGroup;
     errcode NUMBER;
     status BOOLEAN;
BEGIN
     rg_id := Find_Group('RG_BANKNAME');
     IF Id_Null(rg_id) THEN
          Message('No such group: ',ACKNOWLEDGE);
          RAISE Form_Trigger_Failure;
     ELSE
          errcode :=POPULATE_GROUP(rg_id);
          SET_LOV_PROPERTY('LV_NAME', TITLE, 'My Own LOV');
          SET_LOV_PROPERTY('LV_NAME', GROUP_NAME, rg_id);
          SET_LOV_COLUMN_PROPERTY('LV_NAME', 1 ,Title, 'NAME');
          SET_LOV_COLUMN_PROPERTY('LV_NAME', 1 ,Width, 150);
          SET_LOV_COLUMN_PROPERTY('LV_NAME', 2 ,Title, 'SHORT NAME');
          SET_LOV_COLUMN_PROPERTY('LV_NAME', 2 ,Width, 100);
          status := Show_LOV('LV_NAME',10,20);
          IF NOT status THEN
               Message('You have not selected a value.');
               Bell;
          END IF;
     END IF;
END;
My question is do I need to create the LOV Object name call 'LV_NAME'? since I don't have this
create on my design times, because I thought it can be done dynamically on the fly.
The problem is compliant that the Lov Id is not valid.
Thanks
David
Edited by: user445990 on May 24, 2011 9:19 PM

Hello,
You request is not clear. Do you need to display the LOV or not ? In other words, what is the goal of your record group ?
Francois

I am missing the add objects section from the fly out menu in Photoshop CS6. 3d workspace

I am missing the "add objects" section from the fly out menu in Photoshop CS6. I am in the 3D workspace of Photoshop. "Scene" is highlighted and I have clicked on the little fly out menu in the upper right hand corner of that panel. The whole section that should contain, Add objects, delete objects, duplicate objects, all the way through reverse order is missing. The add lights section above and render section below it is there. I am not new to Photoshop, but I am new to the 3D section of Photoshops work space.
I do know about creating a new layer in the layers tab and merging the objects together trick. But I kind of would like for the program to work correctly as I am sure that doing it that way will cause some sort of problems later in the work process.
Below are the specs of my system.
Adobe Photoshop Version: 13.0.1 (13.0.1.3 20131024.r.34 2013/10/24:21:00:00) x64
Operating System: Windows NT
Version: 6.2
System architecture: Intel CPU Family:6, Model:12, Stepping:3 with MMX, SSE Integer, SSE FP, SSE2, SSE3, SSE4.1, SSE4.2, HyperThreading
Physical processor count: 4
Logical processor count: 8
Processor speed: 2394 MHz
Built-in memory: 32651 MB
Free memory: 28832 MB
Memory available to Photoshop: 29606 MB
Memory used by Photoshop: 89 %
Image tile size: 128K
Image cache levels: 4
OpenGL Drawing: Enabled.
OpenGL Drawing Mode: Basic
OpenGL Allow Normal Mode: True.
OpenGL Allow Advanced Mode: True.
OpenGL Allow Old GPUs: Not Detected.
Video Card Vendor: Intel
Video Card Renderer: Intel(R) HD Graphics 4600
Display: 3
I am actually running windows 8. So I am not sure why it is saying windows NT. Anyway...
Photoshop says that my software is up to date. I use Photoshop daily and everything else works just fine. I have looked through this forum and there is someone else who had the same issue as me but their question was not given a solution. So that is why I choose to post it again.
Any help will be great. Thank you!
Mark.

I've made tests with four different 3rd party tools: OpenGL Extension Viewer, GPU Caps Viewer, Compute4Cash OpenCL Diagnostic Tool and Mudlord's Glide3x wrapper tester. All those tools report no problems with my video card driver and OpenGL/CL.
I have contacted nVidia and based on reports from the tools and visual tests from GPU Caps Viewer nVidia support doesn't see a problem with my driver.
I found sniffer_gpu.exe which according to Adobe Help pages is a kind of diagnostic tool and determines whether Photoshop uses the graphic card OpenCL or not. Here is the output:
Device: 00000000002B1BE8 has video RAM(MB): 1023
Vendor string: NVIDIA Corporation
Renderer string: GeForce GTX 650/PCIe/SSE2
Version string: 3.0.0
OpenGL version as determined by Extensionator...
OpenGL Version 3.0
Has NPOT support: TRUE
Has Framebuffer Object Extension support: TRUE
OpenGL ok
OpenCL ok, version=1.1 CUDA 4.2.1
Return code: 3
From Adobe GPU Sniffer tool, it looks OK.
On the other hand, I have your word that there is no problem with Photoshop not recognizing OpenCL for my card and that nVidia driver has problems. Can you justify this somehow? Perhaps you could provide more details on technical level, or another utility to run and extract details, to at least identify the problem Photoshop has and hopefully solve it on either side.
P.S. During tests there were two things which I noticed, but they are probably not related to the issue:
1. One tool reports the lack of Windows registry key SOFTWARE/Microsoft/Windows (NT)/CurrentVersion/OpenGLDrivers. But according to your previous statement, Photoshop only uses OS calls, no registry and according to nVidia, this key is not used in Windows 7.
2. During some tests GPU Caps Viewer reports that "OpenCL CPU not supported on the selected platform". This is not complaining about GPU, only about CPU. But Photoshop is complaining about GPU, so it shouldn't be relevant.

Workflow to set a choice field on the fly

Is it possible for a list workflow to execute on the fly as conditions are met before Save is pressed?
Example: list has two choice columns. Col1 has choices A, B, C. Col2 has choices 1, 2, 3
Workflow is created so that if user chooses A in Col1, then Col2 will get automatically set to 1. The problem is that Col2 only gets set to 1 when the user Saves the new item and refreshes the page. I want Col2 to get set to 1 on the fly as soon as
the user sets Col1 to A. is this possible using workflows? If not, is it possible any other way in SharePoint 2010.
Thanks... Mike
Note: Col2 is not a Calculated field because if A is not chosen in Col1, the user needs to be free to choose 2 or 3 in Col2. Thus it needs to be a Choice field.

SPD workflows consist of actions and triggers. You can combine as many triggers as you need but be aware the default condition is an OR clause, not an AND clause.
You can also set workflows to trigger on item edit, not just item creation. You'd want to use a few pause steps to finetune the workflow but what you want to achieve is possible.
Steven Andrews
SharePoint Business Analyst: LiveNation Entertainment
Blog: baron72.wordpress.com
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My Wiki Articles:
CodePlex Corner Series
Please remember to mark your question as "answered" if this solves (or helps) your problem.

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