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Symmetric encryption algorithms use one key for encrypting and decrypting data. You can create a utility class that performs the encryption and decryption of sensitive data:

Imports System

Imports System.IO

Imports System.Text

Imports System.Security.Cryptography

Public NotInheritable Class SymmetricEncryptionUtility

Private Sub New()

End Sub

Private Shared _ProtectKey As Boolean

Private Shared _AlgorithmName As String

‘ You can …

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The CryptoStream wraps an ordinary stream and uses an ICryptoTransform. The CryptoStream have the following key advantages:

– You can use automatic encryption without worrying about the block size required by the algorithm, because the CryptoStream uses buffered access.

– CryptoStream wraps an ordinary .NET stream-derived class and you can …

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The ICryptoTransform interface represents blockwise cryptographic transformation which could be an encryption, ecryption, hashing, Base64 encoding/decoding, or formatting operation.  You can create an ICryptoTransform object for a given algorithm by using the:

– CreateEncryptor() method – if you want to encrypt data.

– CreateDecryptor() method – if you want to encrypt data.

The next code …

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You can create strong random number values with the System.Security.Cryptography.RandomNumberGenerator class. You use these random key or salt values when you want to store salted password hashes. A salted password hash is a hash created from a password and a so-called salt where salt is a random value. This guarantees that even if two users select …

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X509 certificates play an important role in the world of the Web, because they establish SSL communication and perform certificate authentication to secure traffic between the web server and its clients. Our site provides more details in the articles How does Secure Sockets Layer (SSL) technology work, How do certificates work and How does …

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The roles API  ships a provider that integrates with Windows roles for Windows authentication: the WindowsTokenRoleProvider. This provider retrieves the Windows group membership information for the currently logged-on user and provides it for your application. When using the WindowsTokenRoleProvider, you have to configure your application using Windows authentication and then configure the WindowsTokenRoleProvider as follows:

<configuration>

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When you enable the roles API, by following the approach described in the article How to use Roles API for Role-Based Authorization in ASP.NET, the RoleManagerModule automatically creates a RolePrincipal instance. This instance contains both the authenticated user’s identity and the roles of the user. The RolePrincipal is a custom implementation of IPrincipal, which is the …

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