expression.SetPasswordEncryptionOptions(PasswordEncryptionProvider, PasswordEncryptionAlgorithm, PasswordEncryptionKeyLength, PasswordEncryptionFileProperties)
expression Required. An expression that returns one of the objects in the Applies To list.
PasswordEncryptionProvider Optional Variant. A case sensitive string of the encryption provider.
PasswordEncryptionAlgorithm Optional Variant. A case sensitive string of the algorithmic short name (i.e. "RC4").
PasswordEncryptionKeyLength Optional Variant. The encryption key length which is a multiple of 8 (40 or greater).
PasswordEncryptionFileProperties Optional Variant. True (default) to encrypt file properties.
Remarks
The PasswordEncryptionProvider, PasswordEncryptionAlgorithm, and PasswordEncryptionKeyLength arguments are not independent of each other. A selected encryption provider limits the set of algorithms and key length that can be chosen.
For the PasswordEncryptionKeyLength argument there is no inherent limit on the range of the key length. The range is determined by the Cryptographic Service Provider which also determines the cryptographic algorithm.
Example
This example sets the password encryption options for the active workbook.
Sub SetPasswordOptions()
ActiveWorkbook.SetPasswordEncryptionOptions _
PasswordEncryptionProvider:="Microsoft RSA SChannel Cryptographic Provider", _
PasswordEncryptionAlgorithm:="RC4", _
PasswordEncryptionKeyLength:=56, _
PasswordEncryptionFileProperties:=True
End Sub