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Cryptography: Employ Strong Encryption in Your Apps with Our CryptoUtility Component

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

When storing sensitive data, you need to be able to identify threats, determine how these threats interact with each other, and how issues can combine to constitute a vulnerability that will leave your data exposed. With a good understanding of the various cryptographic algorithms, salt, hashes, ACLs, and other available techniques, you'll be in a better position to protect your critical data.

Michael Stuart and J Sawyer

MSDN Magazine November 2004

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Encryption (System.Security.Cryptography) .Net 2.0

Hi, Query regarding cryptography.  I'm using .net cryptography to encrypt and decrypt files stored on disk on an asp.net website using .Net 2.0 framework.   The code (copied below) works fine to encrypt and decrypt pdf, tif, jpg, etc.  However when it comes to MS Word documents with embedded images and/or tables I get a "Bad data" error when decrypting.   The same document saved to rtf format is encrypted and decrypted without error.  Also simple formatted text documents in Word format (Office 2003) do not throw an error when being decrypted. Would someone care to point out where I'm going wrong? Thanks, code below   _________________________________    Public Sub Encrypt(ByVal Userid As Integer, ByVal FilePath As String)        'Encrypt the file        Try            Dim EncryptedFilePath As String = FilePath & "enc"            Dim clsNetEnCrypt As New NetEncrypt(User)            clsNetEnCrypt.Encrypt(FilePath, EncryptedFilePath)            'Remove the Unencrypted file  

Serving Silverlight Apps from Windows Mobile

Even if mobile dev is not my every day work, thanks to the .Net Compact Framework, it's still .Net programming.

Here is the scenario:

You come back home, you have a windows mobile phone wifi capable and you want to quickly get access to your phone pictures from your home network.
You just activate the Wifi, run my app and then browse to the provided link from any computer on the network.

Practical Multithreading for Client Apps

Writing applications that use multiple threads is often considered an advanced programming task, prone to errors. In this month's column, I'll focus on a practical application of multithreading in Windows® Forms applications with some real benefits, while attempting to keep things simple. My goal is to present multithreading in an approachable way that addresses a very common need: writing applications with a user interface that remain responsive to the user.

View State Encryption


Hi All,

Why is it that I see the same hash value generated when I use different algorithms for viewstate encryption. I have added below lines to the web.config file

<pages viewstateEncryptionMode="Always"

Error Registering COM+ Component

Hi All,

I am experimenting with using EnterpriseServices. I created a component, created the SNK file, compiled the DLL. In the assemblyinfo.vb file, I added '<Assembly: AssemblyKeyFile("c:\key.snk")> '.
I created a new package in COM+, When I attempt to add the .dll to the package i get:

An error occured while processeing the last operation.
Error Code 80020009 - Exception ocurred.

The eventlog may contain additional troubleshooting information.

Here is the Event log:

Installation of 'TransactionalComponentsCore.dll' into '{6367F5F1-56A7-4223-97AC-51F7DC1D53EB}' failed with an exception:

System.EnterpriseServices.RegistrationException: Could not install type library 'TransactionalComponentsCore.tlb' into application 'TransactionalComponentsCore'.

Server stack trace:
at System.EnterpriseServices.RegistrationDriver.InstallTypeLibrary_W2K(ApplicationSpec spec)
at System.EnterpriseServices.RegistrationDriver.InstallTypeLibrary(ApplicationSpec spec)
at System.EnterpriseServices.RegistrationDriver.InstallAssembly(RegistrationConfig regConfig, Object obSync)
at System.EnterpriseServices.RegistrationHelperTx.InstallAssemblyFromConfig(RegistrationConfig& regConfig, Object sync)
at Sys

iPhone and mobile apps


Hi Guys,


I would like to develop a mobile application such as the one you find in iPhones but I don't know from where to start!!? I'm not looking for something complicated, just an a static application of an eBook that users can read an flip the pages, I don't think that you can do such animation easily in ASP.net so does anyone knows what tool that I can use to develop such application?






Smart Client: Building Distributed Apps with NHibernate and Rhino Service Bus, Part 2


Smart client applications are responsive and promote interactivity with the user. In this article, we continue building a smart client application using NHibernate for data access and Rhino Service Bus for reliable communication with the server.

Oren Eini

MSDN Magazine August 2010

Smart Client: Building Distributed Apps with NHibernate and Rhino Service Bus


Smart client applications are responsive and promote interactivity with the user. In this article, we start the processes of planning and building a smart client application using NHibernate for data access and Rhino Service Bus for reliable communication with the server.

Oren Eini

MSDN Magazine July 2010

Practical OData: Building Rich Internet Apps with the Open Data Protocol


See how you can build Rich Internet Applications that take advantage of the OData protocol to creatively interact with Silverlight, PowerPivot, SQL Server, SharePoint, the Windows Azure platform, "Dallas" and more.

Shayne Burgess

MSDN Magazine June 2010

Windows Azure: Developing and Deploying Cloud Apps in Visual Studio 2010


You'll find direct support for building Windows Azure applications in Visual Studio 2010 and Visual Web Developer 2010 Express. We'll walk you through using Visual Studio 2010 for the entirety of the Windows Azure application development lifecycle.

Jim Nakashima

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Test Run: Testing Silverlight Apps Using Messages


Silverlight greatly simplifies the process of building rich Web applications, and we'll walk through an example of using Messages as a quick method of interactively testing simple Silverlight apps.

James McCaffrey

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Managed Extensibility Framework: Building Composable Apps in .NET 4 with the Managed Extensibility F


Glenn Block explains how the Managed Extensibility Framework, a new library coming in .NET Framework 4.0, tackles the longstanding issue of building applications and components that can be reused and extended by others. Learn how to build apps that can use new functionality introduced by developers, framework authors and third-party extenders.

Glenn Block

MSDN Magazine February 2010

Claims-Based Apps: Claims-Based Authorization with WIF


Over the past few years, federated security models and claims-based access control have become increasingly popular. Platform tools in this area have also come a long way. Windows Identity Foundation (WIF) is a rich identity model framework designed for building claims-based applications and services and for supporting active and passive federated security scenarios.

Michele Leroux Bustamante

MSDN Magazine November 2009

N-Tier Apps and the Entity Framework: Building N-Tier Apps with EF4


This article is the third in a series about n-tier programming with the Entity Framework, specifically about building custom Web services with the Entity Framework and WCF. This article looks at features coming in the second release of the Entity Framework (EF4) and how you use them to implement the Self-Tracking Entities and Data Transfer Objects (DTOs) n-tier patterns.

Daniel Simmons

MSDN Magazine November 2009

Silverlight: Composite Web Apps With Prism


This article reviews the Prism project developed by the Microsoft patterns & practices group and demonstrates how to apply it to composite Web applications using Silverlight.

Shawn Wildermuth

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Velocity: Build Better Data-Driven Apps With Distributed Caching


Microsoft Velocity exposes a unified, distributed memory cache for client application consumption. We show you how to add Velocity to your data-driven apps.

Aaron Dunnington

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Silverlight Patterns: Model-View-ViewModel In Silverlight 2 Apps


In this article, you'll learn how to avoid problematic tight coupling by applying the Model-View-ViewModel pattern in Silverlight 2.

Shawn Wildermuth

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