protection

const (
	// RC4128 keeps the legacy RC4 protection behavior and remains the default
	// for compatibility until a future major release changes it.
	RC4128 Encryption = iota
	// AES128 selects AESV2, the PDF standard security handler revision 4
	// algorithm using AES-128-CBC for strings and streams.
	AES128
)

const (
	// None represents no protection.
	None Type = 0
	// Print represents a print protection.
	Print Type = 4
	// Modify represents modification protection.
	Modify Type = 8
	// Copy represents copy protection.
	Copy Type = 16
	// AnnotForms represents annotation and form protection.
	AnnotForms Type = 32
)