C#

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Managing senesitive data Dushan12321-Jan-09 2:41 Dushan123 21-Jan-09 2:41  I am developing a windows application using c#. In this Application i need record some sensitive data such as user name and password. In this application i am not using database. Please tell me a way to manage these data in secure way. Please help me this is very argent. Dushan Perera Re: Managing senesitive data musefan21-Jan-09 2:52 musefan 21-Jan-09 2:52  What are the username and password used for? If just logging in then you can create an MD5 hash and store as that. if you need to be able to recall usernames/password then look at encryption Re: Managing senesitive data #realJSOP21-Jan-09 3:12 #realJSOP 21-Jan-09 3:12  Encrypt the data before saving it to a User Settings file. Also, before distributing your application, make sure you obfuscate it with a decent obfuscation tool (the one that comes with VS is NOT adequate). "Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997 ----- "...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001 Re: Managing senesitive data Ben Fair21-Jan-09 3:15 Ben Fair 21-Jan-09 3:15  The answer mainly depends on the architecture of the application. Will it be used by many different users that aren't on the same network, or within a local Intranet? What resources will be available to your application to hold that data? You'll have to take those considerations into account in order to determine what is the best option for persisting the data. Regardless of your choice, you are going to need persistent storage of some format to hold the data. Whatever option you decide to go with make sure you store a hash of password values. Personally, I use the .NET MD5 implementation (MD5CryptoServiceProvider) to hash passwords, but the .NET Framework includes a number of hash algorithm implementations. In practice, you should persist the hash rather than the actual password and when authenticating, you take the hash of whatever the user enters and compare it against the hash that was persisted; if it matches then they entered the correct password. It's not mathematically possible to get the original value from a hash. If you need to secure other data you can use some of the other .NET Cryptography classes to encrypt the data. Either way a number of Symmetric encryption algorithms (aka Secret Key) are included in the .NET framework (the .NET Rijndael implementation is what I usually use). You'll generally need to create your own binary Key and Initialization Vector (IV, for short and commonly referred to as the 'Salt'). The Key and IV lengths vary somewhat for the different algorithms so you'll need to read up on that as you decide on an encryption scheme that works for you. Symmetric encryption requires the same Key and IV be used for decryption as was used to encrypt the data, so it's common to choose a Key and IV for your application that are pretty much static. If you need more flexibility than that you can look into the Asymmetric encryption (aka Public key/Private key) but those generally require more complexity, however there are certainly situations that call for it. Keep It Simple Stupid! (KISS) WebBrowser Control C# (VS 2003) Member 231211721-Jan-09 2:02 Member 2312117 21-Jan-09 2:02  Hi, I am trying to display an email in the WebBrowser control. Althoug it is displaying the body of the email correctly it doesn't display the additional information like the sender info (From, To, Subject etc). How can I manipulate the browser to add these information? (as it is available in the .eml file)? Can I set additonal information in the WebBrowser.Document? Many thanks! Re: WebBrowser Control C# (VS 2003) Eddy Vluggen21-Jan-09 3:38 Eddy Vluggen 21-Jan-09 3:38  A browser is not meant to display .eml files, but to display .htm. You'll have to extract this information yourself, and display accordingly. I are troll Re: WebBrowser Control C# (VS 2003) Member 231211721-Jan-09 20:04 Member 2312117 21-Jan-09 20:04  Thanks for the information. Do you know where I can find information on how to extract the information? What do I use? Thank you! Re: WebBrowser Control C# (VS 2003) Eddy Vluggen21-Jan-09 20:59 Eddy Vluggen 21-Jan-09 20:59  Open the email-file (*.eml) with Notepad. The method of extraction is a matter of taste, I'd go for the RegExes. I are troll Re: WebBrowser Control C# (VS 2003) Member 231211725-Jan-09 23:10 Member 2312117 25-Jan-09 23:10  Thank you! Datagridview heater ArielR21-Jan-09 1:40 ArielR 21-Jan-09 1:40  How to centre a datarowview column heather? thanks Re: Datagridview heater musefan21-Jan-09 1:50 musefan 21-Jan-09 1:50  do you mean center the text of the 'header' at the top of the of the grid view? Re: Datagridview heater musefan21-Jan-09 1:57 musefan 21-Jan-09 1:57  if so then: dataGridView1.Columns[0].HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter; Re: Datagridview heater ArielR21-Jan-09 2:37 ArielR 21-Jan-09 2:37  Ohh, yes, excuse me about the mistake. Thank you very much Re: Datagridview heater Nagy Vilmos21-Jan-09 1:51 Nagy Vilmos 21-Jan-09 1:51  What have you tried? Maybe a code snippet from you will help us to point you in the right direction. Otherwise try google. Panic, Chaos, Destruction. My work here is done. That's wonderful! CPallini21-Jan-09 1:52 CPallini 21-Jan-09 1:52  ArielR wrote: How to centre a datarowview column heather? That's wonderful! Welcome in the CP's members memorable quotes. [^] If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile. This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke [My articles] Re: That's wonderful! ArielR21-Jan-09 2:45 ArielR 21-Jan-09 2:45  JA!, Thank you for the postulation, ..have hard fingers... Re: Datagridview heater Manas Bhardwaj21-Jan-09 1:53 Manas Bhardwaj 21-Jan-09 1:53  Didn't know that C# can be used to get heat too Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good. Re: Datagridview heater musefan21-Jan-09 1:56 musefan 21-Jan-09 1:56  lol maybe 'Datagridview' are an electrical appliance company and he stumbled on this forum while looking for tips on the layout of his house funiture Get values from binding.position 0 without changinbg binding position? kanchoette21-Jan-09 1:27 kanchoette 21-Jan-09 1:27  I have a binding to a datatable and want to return values from the columns for position zero without changing the binding position to do it. How can i do this please? Re: Get values from binding.position 0 without changinbg binding position? ArielR21-Jan-09 2:29 ArielR 21-Jan-09 2:29  simple, mydataset.mydatatable[0].mycolumnName.... Re: Get values from binding.position 0 without changinbg binding position? kanchoette21-Jan-09 3:18 kanchoette 21-Jan-09 3:18  Many thanks. Format DateTime to string with no seconds anderslundsgard21-Jan-09 1:12 anderslundsgard 21-Jan-09 1:12  I want to format a DateTime value into a string. The thing is that I’m developing a Multilanguage application and I want to format the string according to the users culture. For example: Swedish: YYYY:MM:DD HH:mm English: DD/MM/YYYY HH:mm _____________________________ ...and justice for all Re: Format DateTime to string with no seconds Christian Graus21-Jan-09 1:15 Christian Graus 21-Jan-09 1:15  I believe there's a ToString method that uses the local culture, or that takes the culture at least, so you can ask the system for it ). Christian Graus Driven to the arms of OSX by Vista. Re: Format DateTime to string with no seconds anderslundsgard21-Jan-09 6:52 anderslundsgard 21-Jan-09 6:52  DateTime.ToString("g") made it for me. _____________________________ ...and justice for all Re: Format DateTime to string with no seconds Ennis Ray Lynch, Jr.21-Jan-09 2:24 Ennis Ray Lynch, Jr. 21-Jan-09 2:24  If you are creating a multi-language application you should use the ToShortDateString, etc methods which are based on the current culture settings of the application. http://msdn.microsoft.com/en-us/library/system.datetime.toshortdatestring.aspx[^] Need software developed? Offering C# development all over the United States, ERL GLOBAL, Inc is the only call you will have to make. If you don't ask questions the answers won't stand in your way. Most of this sig is for Google, not ego.

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