MemoryProtectionScope Enumeration

 
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Specifies the scope of memory protection to be applied by the Protect method.

Namespace:   System.Security.Cryptography
Assembly:  System.Security (in System.Security.dll)

Public Enumeration MemoryProtectionScope

Member nameDescription
CrossProcess

All code in any process can unprotect memory that was protected using the Protect method.

SameLogon

Only code running in the same user context as the code that called the Protect method can unprotect memory.

SameProcess

Only code running in the same process as the code that called the Protect method can unprotect memory.

This enumeration is used with the Protect and Unprotect methods to protect data in memory.

The following code example shows how to use data protection.

Imports System
Imports System.Security.Cryptography



Public Class MemoryProtectionSample

    Public Shared Sub Main()
        ' Create the original data to be encrypted (The data length should be a multiple of 16).
        Dim secret As Byte() = {1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4}

        ' Encrypt the data in memory. The result is stored in the same same array as the original data.
        ProtectedMemory.Protect(secret, MemoryProtectionScope.SameLogon)

        ' Decrypt the data in memory and store in the original array.
        ProtectedMemory.Unprotect(secret, MemoryProtectionScope.SameLogon)

    End Sub
End Class

.NET Framework
Available since 2.0
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