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MemoryProtectionScope Enumeration

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 enum class MemoryProtectionScope
public enum MemoryProtectionScope
public enum MemoryProtectionScope

 Member nameDescription
CrossProcessAll code in any process can unprotect memory that was protected using the Protect method. 
SameLogonOnly code running in the same user context as the code that called the Protect method can unprotect memory. 
SameProcessOnly 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.

#using <System.Security.dll>

using namespace System;
using namespace System::Security::Cryptography;

int main()
{
   
   // Create the original data to be encrypted (The data length should be a multiple of 16).
   array<Byte>^secret = {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 );
}

import System.*;
import System.Security.Cryptography.*;

public class MemoryProtectionSample
{
    // Create aditional entropy for use with the Protect method.
    private static ubyte sAditionalEntropy[] =  { 9, 8, 7, 6, 5 };

    public static void main(String args[])
    {
        // Create the original data to be encrypted (The data length should 
        // be a multiple of 16).
        ubyte secret[] =  { 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);
    } //main
} //MemoryProtectionSample 

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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