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• Creating deterministic key pairs in javascript for use in encrypting/decrypting/signing messages

  - by SlickTheNick

  So I have been searching everywhere and havn't been able to find anything with the sufficient information I need.. so Im a bit stumped on this one at the moment What I am trying to do is create a public/private key pair (like PGP) upon a users account creation, based on their passphrase and a random seed. The public key would be saved on the server, and ideally the private key would never be seen by the server whatsoever. The user could then sign in, and send a message to another user. Before the message is sent, the senders key pair would be re-generated on the fly based on their credentials (and maybe a password prompt) and used to encrypt the message. The receiver would then use their own re-generated private key to decrypt said message. The server itself should never see any plaintext passwords, private keys or readable messages. Bit unsure how on how I could go about implementing this. Iv been looking into PGP, specifically openPGP.js. The main trouble I am having is being able to regenerate the key-pair based off a specific seed. PGP seems to have a random output even if the inputs are the same. Storing the private key in a cookie or in HTML5 storage or something also isnt really an option, too unreliable. Can anyone point me in the right direction?

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• Replace gvimext.dll in Windows 8

  - by Leftium

  How can I get the "Edit with ... using tabs" functionality in gVim on Windows 8 (64-bit)? I'd like to swap out gVim's stock gvimext.dll for one that adds an "Edit with ... using tabs" option to Explorer's right-click context menu. On Windows 7 (64-bit) I used to be able to download the DLL and swap it in by following these instructions. However, I can't get it to work in Windows 8. The stock installation's context menu (sans "... using tabs") works fine (without a restart) ...but after replacing the DLL the gVim context menu options disappear and the gvimext.dll no longer seems to even load. (Windows 8 was restarted) if I again replace gvimext.dll with a backup of the stock DLL, the context menu options remain missing and the DLL still seems to fail to load (Windows 8 was restarted, again) If I re-install gVim, the context menu items return (even without a restart) What is the difference here between Windows 7 (where swapping DLL's works) and Windows 8 (where swapping DLL's fails)?

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• SQL Server 2005 64bit on 16GB machine uses 3.6GB memory only

  - by ArjanP

  Maximum server memory is set to the maxvalue AWE is disabled (should not be needed in 64 bit anyway) Windows Server 2008 Enterprise SP2 It is a virtual server using VMWare If I look in Task Manager the sqlservr.exe process only uses about 3.6 GB of memory. Is that number not real? Shouldn't it attempt to use all available memory? If I run DBCC MEMORYSTATUS I get: VM Reserved 16670136 VM Committed 3640664 It looks like a memory limit I shouldn't be seeing in a 64 bit environment.. how can I get SQL2005 to use more memory?

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• What are the advantages to use vector-based fonts over bitmap fonts in (2d) games?

  - by jmp97

  I know that many games are using bitmap fonts. Which are the advantages for vector-based font rendering / manipulation when compared to bitmap fonts and in which scenarios would they matter the most? Prefer a focus on 2d games when answering this question. If relevant, please include examples for games using either approach. Some factors you might consider: amount of text used in the game scaling of text overlaying glyphs and anti-aliasing general rendering quality font colors and styling user interface requirements localisation / unicode text wrapping and formatting cross-platform deployment 2d vs 3d Background: I am developing a simple falling blocks game in 2d, targeted for pc. I would like to add text labels for level, score, and menu buttons. I am using SFML which uses FreeType internally, so vector-based features are easily available for my project. In my view, font sizes in simple games often don't vary, and bitmap fonts should be easier for cross-platform concerns (font-formats and font rendering quality). But I am unsure if I am missing some important points here, especially since I want to polish the looks of the final game.

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• Static / Shared Helper Functions vs Built-In Methods

  - by Nathan

  This is a simple question but a design consideration that I often run across in my day to day development work. Lets say that you have a class that represents some kinds of collection. Public Class ModifiedCustomerOrders Public Property Orders as List(Of ModifiedOrders) End Class Within this class you do all kinds of important work, such as combining many different information sources and, eventually, build the Modified Customer Orders. Now, you have different processes that consume this class, each of which needs a slightly different slice of the ModifiedCustomerOrders items. To enable this, you want to add filtering functionality. How do you go about this? Do you: Add Filtering calls to the ModifiedCustomerOrders class so that you can say: MyOrdersClass.RemoveCanceledOrders() Create a Static / Shared "tooling" class that allows you to call: OrdersFilters.RemoveCanceledOrders(MyOrders) Create an extension method to accomplish the same feat as #2 but with less typing: MyOrders.RemoveCanceledOrders() Create a "Service" method that handles the getting of Orders as appropriate to the calling function, while using one of the previous approaches "under the hood". OrdersService.GetOrdersForProcessA() Others? I tend to prefer the tooling / extension method approaches as they make testing a little bit simpler. Although I dependency inject all my sourcing data into the ModifiedCustomerOrders, having it as part of the class makes it a little bit more complicated to test. Typically, I choose to use extension methods where I am doing parameterless transformations / filters. As they get more complex, I will move it into a static class instead. Thoughts on this approach? How would you approach it?

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• Is Exchange protected from/allow back dated emails?

  - by David

  Does Exchange Server adequately protect against backdating items in a mailbox folder? I want to determine from an auditing perspective what level of risk exists/what trust can be put into Exchange database records. Is there a (mis)feature that allows end point users to modify the sent/recieved date fields on their own messages? Is there a reasonable way short of hand editing the files for an Exchange Server admin to make such a change? And most importantly: Is there any kind of "sequence number" that we could use to audit Exchange records for evidence of date manipulation (ex. msg100 = Dec 15, msg101 = Dec 10, msg102 = Dec 16)

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• Application that provides unique keys to multiple threads

  - by poly

  Thanks all for your help before. So, this is what I came up with so far, the requirements are, application has two or more threads and each thread requires a unique session/transaction ID. is the below considered thread safe? thread 1 will register itself with get_id by sending it's pid thread 2 will do the same then thread 1 & 2 will call the function to get a unique ID function get_id(bool choice/*register thread or get id*/, pid_t pid) { static int pid[15][1]={0};//not sure if this work, anyway considor any it's been set to 0 by any other way than this static int total_threads = 0; static int i = 0; int x=0,y=0; if (choice) // thread registeration part { for(x=0;x<15;x++) { if (pid[x][0]==0); { pid[x][0] = (int) pid; pid[x][1] = (x & pidx[x][1]) << 24;//initiate counter for this PID by shifting x to the 25th bit, it could be any other bit, it's just to set a range. //so the range will be between 0x0000000 and 0x0ffffff, the second one will be 0x1000000 and 0x1ffffff, break; } total_threads++; } } //search if pid exist or not, if yes return transaction id for(x=0;x<15;x++) { if (pid[x][0]==pid); { pid[x][1]++;//put some test here to reset the number to 0 if it reaches 0x0ffffff return pid[x][1]; break; } } }

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• Dealing with under performing co-worker

  - by PSU_Kardi

  I'm going to try to keep this topic as generic as I can so the question isn't closed as too specific or whatever. Anyway, let's get to it. I currently work on a somewhat small project with 15-20 developers. We recently hired a few new people because we had the hours and it synched up well with the schedule. It was refreshing to see hiring done this way and not just throwing hours & employees at a problem. Alas, I could argue the hiring process still isn't perfect but that's another story for another day. Anyway, one of these developers is really under performing. The developer is green and has a lot of bad habits. Comes in later than I do and leaving earlier than I am. This in and of itself isn't an issue, but the lack of quality work makes it become a bit frustrating. When giving out tasking the question is no longer, what can realistically be given but now becomes - How much of the work will we have to redo? So as the project goes on, I'm afraid this might cause issues with the schedule. The schedule could have been defined as a bit aggressive; however, given that this person is under performing it now in my mind goes from aggressive to potentially chaotic. Yes, one person shouldn't make or break a schedule and that in and of itself is an issue too but please let's ignore that for right now. What's the best way to deal with this? I'm not the boss, I'm not the project lead but I've been around for a while now and am not sure how to proceed. Complaining to management comes across as childish and doing nothing seems wrong. I'll ask the community for insight/advice/suggestions.

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• Audible Books does not install my books into my iTunes and wants me to do it manually, I can't figure out how

  - by Alice

  Audible Books fails to install into iTunes I am using a desktop with Windows 7 64 bit. I have been downloading Audible Books for 3 years and have 85 installed. Several months ago downloading them did not put them in iTunes and the system wants me to import them manually. You start with "C\Program Files\iTunes\ and add two lines..... I know I need to choose the destination for 64 bit, but I do not see iTunes and I do not know how to put this title into iTunes if I can locate it? The folks at Audible wasted a lot of my time but were zero help! How can I get these books into my computer?

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• Career change: from programming into more human-oriented area [closed]

  - by Art

  I have been a software developer for approximately 9 years, starting with part-time work during my graduation year at uni. During these years I worked for number of companies, sometimes changing places twice or three times a year. They say it takes 10 years to reach 'expert' level, and while I don't think I am an expert by any measure and I have certainly met lots of people who are more knowledgeable, smarter and more focused than I am, I think I can safely say that I had my fair share of the whole programming trade and would like to move on to something else. Psychology and behaviour was always something I was interested in, especially the practical, applicable bits of it. Recently I've been to some communication skills training and I realised that I have been missing out on the great deal of fun stuff - how people work and communicate, especially in subconscious, non-verbal area. Currently I am thinking of making a career change - ideally to move somewhere my technical skill would still be beneficial in some shape or form, or at least could serve as a bridge while I am transitioning there, you know, the whole gradual, bit-by-bit approach versus swim-or-drown one. I would like to hear your thoughts on this matter and to learn from you what are the possible transitions I can take.

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• encoding movies for the web

  - by ELS

  Hi All, I have a friend that hosts his website on IIS and Windows Server 2003 R2 32-bit. He has .WMV files and .MPG and others and some of these are 30 mb in size! He wonders why users complain the site is slow! So my question is how can we reduce the size of these movies? What software? What settings for bit-rate, etc? Is there free software? I can use either a Mac or a PC. Thoughts are appreciated.

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• QR Codes and Short Links - Please Take A Look [closed]

  - by Joe Turner

  I'm looking for a way to create a QR Code and a shortened link when a form is submitted. I have the QR Code bit, but the link is too long for me and the QR Code looks scary and complicated. The way it works is; the user types in (in this instance) a contract number. Then, a folder is created on the server of that contract number. (www.mysite.com/QR/$contractnumber). Then, using PHP again, I create a QR Code through Google because I know that every QR code will be linking to the same place, just a different ending of the link. The only bit that changes is the $POST... I was wondering if there was a way to shorten the link before it goes to Google? It would have to be through php. The user enters the contact number in the form, then that number(usually around 5/6 digits) will be entered into a already existing command? I'm not an expert in anything, I just know some really random snippets of code... And HTML and CSS, of course. Any help would be appreciated and judging by the few days I have been searching this, I think it might help a few people in the future. I would also like to confirm that the solution can't be one of this visual URLShorteners. If it is, it just needs to be the back-end of it, built into a existing form and QR Generator. Simple?

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• What's better for deploying a website + DB on EC2: 2 small VM or a large one?

  - by devguy

  I'm planning the deployment of a mid-sized website with a SQL Server Standard DB. I've chosen Amazon EC2 to deploy it. I now have to choose between these 2 options: 1) get 2 small instances (1 core each, 1.7 GB of ram each): one for the IIS front-end, one for running the DB. Note: these "small instances" can only run the 32-bit version of Win2008 Server 2) a single large instance (4 cores, 7.5 gb of ram) where I'd install both IIS and the SQL Server. Note: this large instance can only run the 64-bit version of Win2008 Server What's better in terms on performance, scalability, ease of management (launch up a new instance while I backup the principal instance) etc. All suggestions and points of view are welcome!

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• Can the JVM(Oracle) run into an OutOfMemory error if the heap size is below the max?

  - by user439407

  I am running a Tomcat site(with an NGinx front end) that seems to be randomly running out of memory even though the max heap size is pretty large. My question is is it possible for the JVM to get an OutOfMemory error even if the heap size is significantly less than -Xmx? For instance, here is a snapshot I took just 15 seconds before an OutOfMemory error: Tue Dec 18 23:13:28 JST 2012 Free memory: 162.31 MB Total memory: 727.75 MB Max memory: 3808.00 MB I guess theoretically it's possible that my code generated 3 gigs worth of objects in 15 seconds, but I highly doubt it. It seems like the JVM was unable to grow the heap even though it theoretically had room....Is it possible that other processes started using memory to the point that the JVM could not grow? I am running 64-bit Oracle Hotspot on a 64 bit vm running CentOS 5 with 6 gigs of ram.

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• Less daunting front end for SQL Server

  - by Martin

  We currently have a few users who have been using Access very succesfully to throw around large amounts of data. We've now got to the point where the data is just too large to be held in Access, as well as wanting to hold it in a single place where multiple users can access it. We have therefore moved the data over to SQL Server. I want to provide a general tool that they can use to view the data on the server and do some simple things like run queries and filters and export the data for offline manipulation. I don't want the support headaches that might come with rolling out SQL Management Studio, and neither do I want to have to create an Access database with links for each current database or ones that are created in the future. Can anyone recommend a simple tool that will connect to a server, list all the databases and allow a user to drill into a table and look at the data. Many thanks.

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• Removing 'bundled' software to make a slow laptop faster?

  - by spdegabrielle

  My brother-in-law has a cheap HP laptop used by his kids for schoolwork. It had got into a bit of a state and was running slowly with some dubious software. I removed a bunch of stuff that had been installed, that was obviously not required (three different driver scanners!), had been downloaded in error or looked like malware. I also disabled as many 'start on login' apps as I could and removed AVG replacing it with MSE. (AVG is uninstalled and replaced with MSE after failing to detect malware) What remains is a significant quantity of bundled HP and 'nero backup' software, including a HP restore utility (apparently something like the osx hidden partition restore), the trackpad driver. is there anything else I can do to breath a little more life into the old 'celeron' laptop? Should I bit the bullet and just put win8 on it? Will the trackpad still work?

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• What is the best resource or method for learning more about servers and networking?

  - by kaleidomedallion

  I can get around a server to some degree, but everything I have learned has been as I have needed to learn it. Every once in a while I will learn about some new command that will revolutionize how I think about systems and networking, and realize how I could have been using it this whole time if only I had known about it. Anything to bring someone from novice to some kind of fluency? Do I just need to earn the battle scars bit by bit over the course of years? (I mean of course I do but what can I do to help it be not quite so painful?) For instance, I am still fuzzy on all of networking. Any help would be greatly appreciated.

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• How can i compare Audio, what programming language should i use

  - by Pimmetje

  I have 2 audio files that are from almost the same source. But at some points there shifted a bit. Also the codecs does not match. I would like to make a program that takes a sample 2 - 4 seconds. And looks for it in the other file. (Most of the time it's not shifted more than 30 seconds). Than take the time and store it, Go ahead for a few seconds take a sample and find it again. This way i want to create a file where i can see on what points the file is shifted. For people who are more interested in what i want. I have a audio/video file speech and subtitles. But i have same speech from different sources with differs a bit in time. And i like to make a program that can correct the subtitle time for me. Enough about the problem I looked on the Internet for ways to compare audio files. Based on what i read comparing 2 audio files isn't that easy as i had hoped. Some talk about algorithms http://www.perlmonks.org/?node_id=169641 Some audio-library's portaudio.com aubio.org sourceforge.net/projects/ccaudio/ ambiera.com/irrklang/ The biggest problem i have is that i can't find something i can generate from the audio that i can use to compare with. I hope someone here can point me in the right direction.

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• Restore Point area getting deleted

  - by PaoloFCantoni

  Hi, I'm running a multi-boot scenario (which I have been successfully on a number of machines for a number of years). I have Windows 7 (32 bit) on one partition and Windows 7 (64 bit) on another and a common data partition (which happens to store the user hives for each OS instance). For some reason, on one particular machine (a HP Pavilion notebook) the restore points get trashed after a reboot. I can create them (both manually and automatically), but after some (but not all) reboots the restore points get trashed. I have all three partitions set (on both OSs) to hold restore information. This setup has worked successfully on other machines for at least 12 months. I'm out of ideas... I DO need the restore points as I do "bleeding edge" stuff and they've saved my bacon on other machines in the past... TIA, Paolo

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• How to activate Windows 8 Pro license with Releae Preview installed?

  - by Antonio

  So I'm one of the many who downloaded the Release Preview (64-bit). I now got the ISO to install Windows 8 Professional (64-bit) and a product key (note: I didn't get these from either Windows 8 Upgrade Assistant or Microsoft's web Store), everything legal. However, the Windows 8 Upgrade Assistant only gives me the option to Store my personal files which means that I'll have to say goodbye to both my Program Files and their respective configurations. I just want to input the Product Key and activate the license, why isn't this possible? Even "Add Features to Windows 8" doesn't accept the key. Do I really need to backup all of my stuff and make a clean install?

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• Is there a better strategy than relying on the compiler to catch errors?

  - by koan

  I've been programming in C and C++ for some time, although I would say I'm far from being an expert. For some time, I've been using various strategies to develop my code such as unit tests, test driven design, code reviews and so on. When I wrote my first programs in BASIC, I typed in long blocks before finding they would not run and they were a nightmare to debug. So I learned to write a small bit and then test it. These days, I often find myself repeatedly writing a small bit of code then using the compiler to find all the mistakes. That's OK if it picks up a typo but when you start adjusting the parameters types etc just to make it compile you can screw up the design. It also seems that the compiler is creeping into the design process when it should only be used for checking syntax. There's a danger here of over reliance on the compiler to make my programs better. Are there better strategies than this? I vaguely remember some time ago an article on a company developing a type of C compiler where an extra header file also specified the prototypes. The idea was that inconsistencies in the API definition would be easier to catch if you had to define it twice in different ways.

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• Handling commands or events that wait for an action to be completed afterwards

  - by virulent

  Say you have two events: Action1 and Action2. When you receive Action1, you want to store some arbitrary data to be used the next time Action2 rolls around. Optimally, Action1 is normally a command however it can also be other events. The idea is still the same. The current way I am implementing this is by storing state and then simply checking when Action2 is called if that specific state is there. This is obviously a bit messy and leads to a lot of redundant code. Here is an example of how I am doing that, in pseudocode form (and broken down quite a bit, obviously): void onAction1(event) { Player = event.getPlayer() Player.addState("my_action_to_do") } void onAction2(event) { Player = event.getPlayer() if not Player.hasState("my_action_to_do") { return } // Do something } When doing this for a lot of other actions it gets somewhat ugly and I wanted to know if there is something I can do to improve upon it. I was thinking of something like this, which wouldn't require passing data around, but is this also not the right direction? void onAction1(event) { Player = event.getPlayer() Player.onAction2(new Runnable() { public void run() { // Do something } }) } If one wanted to take it even further, could you not simply do this? void onPlayerEnter(event) { // When they join the server Player = event.getPlayer() Player.onAction1(new Runnable() { public void run() { // Now wait for action 2 Player.onAction2(new Runnable() { // Do something }) } }, true) // TRUE would be to repeat the event, // not remove it after it is called. } Any input would be wonderful.

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• Can't see CMD.EXE on Windows 7

  - by Andrea

  I have a problem with Windows 7 and cmd.exe with these conditions: Logon as non admin user Launch cmd.exe I can see cmd.exe in task manager but it's invisible in the desktop and I don't know what to do, everything is fine and I can see cmd.exe if I do login with an admin account. I can see it in the "Process" tab but not in the "Application" tab, and if I launch five cmd.exe's, I see five processes, but from that tab I have no "Bring to front" or "Maximise" I can't find any WOW folder under C:\Windows, even with show hidden and system files enabled. I'm running Windows 7 32-bit running on a 64-bit Intel Core 2 Duo E7500

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• How do I delete Windows.old in Windows 7?

  - by CRK

  I used to run Windows 7 32 bit, but installed the 64 bit version because of a RAM upgrade. During the installation I got this message: The partition you selected might contain files from a previous Windows installation. If it does, these files and folders will be moved to a folder named Windows.old. You will be able to access the information in Windows.old, but you will not be able to use your previous version of Windows. The C:\ drive now has two (2) Windows folders: Windows (15.3 GB) Windows.old (15.7 GB) Don't see why I need the Windows.old taking over 15GB of space on my hard drive so I tried to delete it. It didn't work. How can I safely delete this folder?

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• ubuntu 13.10 liveboot/installer loads dots, then does nothing

  - by user200245

  Problem: When I load an Ubuntu 13.10 (64-bit) live USB / installer on my laptop, the purple Ubuntu screen with the white dots appears, the dots turn orange (indicating its loading), then after a few seconds the screen turns completely black and nothing else happens. I can not install Ubuntu 13.10 on this computer. What I've Tried: I've re-downloaded the .iso file from canonical. I've burned the .iso to the USB using the default linux usb image writer, and the Windows programs YUMI and Linux Live USB Creator; same thing happens each time. Yes, I'm sure my computer is 64 bit. I'm currently running Linux Mint 15 on it, which runs perfectly. It's a Sager NP7330 / Clevo w230st. extra info A few months I installed Ubuntu 13.04 on this machine, which installed perfectly. Normally I'd install that then dist-upgrade to 13.10, HOWEVER this computer is only a few months old and the wireless/network drivers for my network card were not implemented until kernel 3.11 (which comes w ith 13.10). I tried manually downloading kernel 3.11 and installing it (on 13.04), however the wireless card nor ethernet card still did work with Ubuntu 13.04. So my only real hope is to get 13.10 working. Does anyone know what's up with this?

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