Hi, I am writing a string encrypt/decrypt for Pocket PC device using RSACryptoServiceProvider class(OpenNETCF.Security.Cryptography) and able the encrypt the string but getting the error while decrypting Code snippets as follows string pwdStr = "" test ; //Encrypt public string EncryptS...more >>

Hi, I show the public and private key stored in a pfx file. The public key is the same every time I run the program, but the private key isn't. Can someone explain to me why the private key isn't the same every time I run the program? I show the keyexponent and keymodulus of the public key,...more >>

Dear all, I am a bit confuse with hashing and Digitaly sign data. I have understand that hashing a file with a keyed Hash class, you are protecting hash value to be modified becasue it is regenerated with a secret key exanged between the sender and receiver. The receiver will then trust the ...more >>

Hi, I'm currently having a problem for which I haven't foud a solution. I've got a winform application (C#, .NET 1.1) which should work correctly on Vista (currently Beta 2). I'm trying to do a send key but it does crash when the OS is Vista (It works fine on Windows XP and lower). He...more >>

I have a solution with a Windows Application project and two Class Library Projects. I'd like to have the ability to "protect" my Class Libraries from someone copying them and using them in their project. What would be the procude to ensure that the Class Libraries can only be loaded by my ...more >>

My Application makes lots (i mean lots) of interop calls due to the nature of what it does. (Screen scraping, MSAA, post messages to other windows, etc..). It seems to me that the ability to call unmanaged code is a pretty big thing, it can basically leave the environment vulnerable to anything....more >>

I am hosting a C# UserControl in IE that attempts to automate Microsoft Word. When opening Word I get an Error: System.Security.Permissions.SecurityPermission. How can I give my control permission to open Word? ...more >>

I'm trying to use the ProtectedData class to store encrypted data in isolated storage but something seems to be wrong. If I call the class twice with the same string I get a different encrypted value each time. Here's my encryption method: private static string EncryptString(string Input) {...more >>

I have written a C# 2.0 application which writes to (creates subkeys and data values) in the registry under HLM\SOFTWARE. This application works fine when logged in as admin. But it fails when logged into another (non-admin) account. Of course, this is what I expect. However, I am looking f...more >>

I'm trying to use the command line tool caspol.exe to grant full trust to files that are signed by my company. I've created a very simple console application called "TestApp" and ensured that I signed it with my .SNK file. I'm running the following command in the same directory as the test...more >>

Dear all, I have some simple question relative to Keyed hash algorithm. I have understand from different reading that this type of hashing with secret key ( a common password) is used to avoid malicious person to modified the hash value. This by using following code sample : Dim myhash...more >>

Hi everybody, I am not sure where to put this in this forum. So, I posted this at several topics. I created a class library that has two public methods Encrypt() and Decrypt(). I reference this dll to a window application. I used DESCryptoServiceProvider Algorithm to encrypt and decrypt ...more >>

HI all, How do I go about getting the permmisions of a file. I have been able to get a list of access control rules and tell if they are restricting or permiting a permmision but I cant tell which role / right they are refering to: I can get this type information by using the fileSystem...more >>

Hi all, I have one of those situations where not only do I not know the answer, but I am uncertain what the questions is, lol. I need to create an application that for the following need: My company frequently holds trainings in large conference rooms with 300 or more people. We are struggl...more >>

Hey people, anyone know how to check who deleted files from a network share, The permissions allow all users to delete files within folders, someone has managed to delete various files all over the place within a major project folder. I have managed to restore the project from backups and Win...more >>

Dear all Does anyone have or know a real life nice simple sample that use Asymetric encrpytion ? thnaks for help regards serge...more >>

Hi all, I'm new in encryption and I have a question. I want to encrypt a message using RSA RC4 in one machine with the public and decrypt it in another machine with the private key. I have wrote two pages in classic asp for encrypt/decrypt using CAPICOM API. Now my boss want me to move t...more >>

I've seen several questions posted since October regarding the encryption of connection strings, but none of them seem to address my particular need. I want to deploy a .NET 2.0 Windows Forms application that uses an MS Access 2003 database. The database has been encoded and password protect...more >>

I am trying to create a tool for new user creation so that our Help Desks can create users, home directories, the shares, and add them to groups. It was all good until I got to creating shares on the servers (some are DC's) I can't find ANY WAY to get around the following (in C#): System.M...more >>

Dear all, Suring studying security issue on application and cryptin/Decripting, sample I have found use quite a lot the System.Text.Encoding class. Then a point is mentionned that we shave to be carefull on which encoding method is use for Decrypring and Encryprting. What is the way to ...more >>

I have a vb dot net application that signs some code. I want it to run unattended but when it signs the code and accesses the private key then a Dialog is displayed. The dialog ask if I am sure i want this application to access my private key. Is there a way to identify for the protecte...more >>