ProtectedMemory.Protect Method
Assembly: System.Security (in system.security.dll)
'Declaration Public Shared Sub Protect ( _ userData As Byte(), _ scope As MemoryProtectionScope _ ) 'Usage Dim userData As Byte() Dim scope As MemoryProtectionScope ProtectedMemory.Protect(userData, scope)
public static void Protect ( byte[] userData, MemoryProtectionScope scope )
public static function Protect ( userData : byte[], scope : MemoryProtectionScope )
Parameters
- userData
The byte array containing data in memory to protect. The array must be a multiple of 16 bytes.
- scope
One of the MemoryProtectionScope values.
This method can be used to protect data in memory. Note that the method does not make a copy of the data, but encrypts the byte array in place. The userData parameter must be 16 bytes in length or a multiple of 16 bytes.
Support for this method is available in Microsoft Windows XP and later operating systems.
The following code example shows how to use data protection.
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 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.