TdxPSPDFSecurityOptions.KeyLength Property

Specifies the key length used to encrypt a PDF document.

Declaration

property KeyLength: TdxPSPDFEncryptKeyLength read; write; default pekl128;

Property Value

Type	Default
TdxPSPDFEncryptKeyLength	pekl128

Remarks

If security is enabled via the Enabled property, a PDF document is encrypted using a key that is created based on the user and owner passwords specified via the UserPassword and OwnerPassword properties. The security level of encrypted PDF documents depends on the length of the key used for the encryption. Generally, the longer the key, the more security it provides. The standard security provided by PDF documents allows you to use either a 40-bit or 128-bit key for the encryption. To select the key length, use the KeyLength property.

Property values include:

Value	Description
pekl40	A 40-bit key is used.
pekl128	A 128-bit key is used.

The default value of the KeyLength property is pekl128.