ProtectedData.Protect Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Encrypts the data in a specified byte array and returns a byte array that contains the encrypted data.
Assembly: mscorlib.Extensions (in mscorlib.Extensions.dll)
Parameters
- userData
- Type:
System.Byte
[]
A byte array that contains data to encrypt.
- optionalEntropy
- Type:
System.Byte
[]
An optional additional byte array used to increase the complexity of the encryption, or null for no additional complexity.
| Exception | Condition |
|---|---|
| ArgumentNullException | The userData parameter is null. |
| CryptographicException | The encryption failed. |
| NotSupportedException | The operating system does not support this method. |
| OutOfMemoryException | The system ran out of memory while encrypting the data. |
This method can be used to encrypt data such as passwords, keys, or connection strings. The optionalEntropy parameter enables you to add data to increase the complexity of the encryption; specify null for no additional complexity. If provided, this information must also be used when decrypting the data using the Unprotect method.
Note: |
|---|
If you use this method during impersonation, you may receive the following error: "Key not valid for use in specified state." To prevent this error, load the profile of the user you want to impersonate before calling the method. |
Note: