Contents

# 密碼

指定一個密碼，以防止使用者擅自進行變更。

應使用其他人或程式不易找出之密碼。密碼應遵循以下規則：

- 長度為八個字元或更多字元。

- 包含小寫與大寫字母、數字及特殊字元的混合字元。

- 在任何字彙表或百科大全中都找不到。

- 與個人資料無直接關係，例如生日或車牌。

The open password must be entered to open the file.

The permission password must be entered to edit the document.

## 密碼

Type a password. A password is case sensitive.

## 確認

重新輸入密碼。

## 取消密碼保護

若要移除密碼，請開啟文件，然後在不使用密碼的情況下加以儲存。

## 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