Mật khẩu

Gán một mật khẩu để ngăn cản người khác làm thay đổi không được phép.

The open password must be entered to open the file.

The permission password must be entered to edit the document.

Mật khẩu

Type a password. A password is case sensitive.

Xác nhận

Re-enter the password.

Hủy bước bảo vệ bằng mật khẩu

To remove a password, open the document, then save without password.

PDF Passwords

Due to the limitations of the PDF file format, PDF passwords used to protect exported PDF files can contain only the following characters:

• ASCII digits: from “0” to “9”

• Uppercase Latin alphabet: from “A” to “Z”

• Lowercase Latin alphabet: from “a” to “z”

• ASCII punctuation and symbols:

Character	Description
	Space
!	Exclamation mark
"	Quotation mark
#	Number sign
$	Dollar sign
%	Percent sign
&	Ampersand
'	Apostrophe
(	Left parenthesis
)	Right parenthesis
*	Asterisk
+	Plus sign
,	Comma
-	Hyphen-minus
.	Period
/	Slash
:	Colon
;	Semicolon
<	Less-than sign
=	Equal sign
>	Greater-than sign
?	Question mark
@	At sign
[	Left Square Bracket
\	Backslash
]	Right Square Bracket
^	Circumflex accent
_	Low line
`	Grave accent
{	Left Curly Bracket
|	Vertical bar
}	Right Curly Bracket
~	Tilde