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使用 Excel 或 MySQL 資料庫查詢方式，簡易地將個人資料去識別化 (將姓名馬賽克) 。


Simple data anonymization 使用 Excel 或 MySQL 資料庫查詢方式，做簡易個資去識別化 (將姓名馬賽克)
== 姓名的個資去識別化 ==
=== case1: 王小明 --> 王O明; 孤獨求敗 --> 孤OO敗 ===
Reserve the first and last characters of name, and replace other characters with the symbol 'OO'.
 
ex:
* 楊過 --> 楊O
* 王小明 --> 王O明
* 孤獨求敗 --> 孤OO敗
* Guo da-xia --> GOOOOOOOOa
 
methods:
* Excel:
** {{kbd | key=<nowiki>=IF(LEN(A1)=2, LEFT(A1, 1)&"O", LEFT(A1, 1)&REPT("O", LEN(A1)-2)&RIGHT(A1, 1))</nowiki>}}
** {{kbd | key=<nowiki>=REPLACE(A1, 2, 1, "O")</nowiki>}}<ref>[http://blog.xuite.net/yh96301/blog/80724141-Excel+2010%E5%A7%93%E5%90%8D%E7%9A%84%E7%AC%AC%E4%BA%8C%E5%80%8B%E5%AD%97%E5%8F%96%E4%BB%A3%E7%82%BAO Excel 2010姓名的第二個字取代為O @ 軟體使用教學 :: 隨意窩 Xuite日誌]</ref>  {{exclaim}} only applied for 3 characters, NOT for 4 characters
* PHP: using regular_replace
<pre>
if(mb_strlen($string, "UTF-8") == 2){
  echo mb_substr($string, 0, 1, "UTF-8") . "O";
 
}else{
  $pattern = '/^(\X)(\X+)(\X)/u';
  preg_match($pattern, $string, $matches);
  echo $matches[1]. str_repeat("O", mb_strlen($string, "UTF-8") - 2) . $matches[3];
 
}
</pre>
* MySQL:
<pre>
SET @name := "楊過";
-- SET @name := "王小明";
-- SET @name := "孤獨求敗";
-- SET @name := "Guo da-xia";
 
SELECT CASE 
    WHEN CHAR_LENGTH(@name) =2 THEN CONCAT(LEFT(@name, 1), 'O')
    ELSE CONCAT(LEFT(@name, 1), REPEAT('O', CHAR_LENGTH(@name)-2), RIGHT(@name, 1))
    END;
</pre>
 
=== case2: 王小明 --> 王O明; 孤獨求敗 --> 孤O敗 ===
 
ex:
* 楊過 -> 楊O
* 王小明 --> 王O明
* 孤獨求敗 --> 孤O敗
* Guo da-xia --> GOa
 
 
methods
* Excel:
** {{kbd | key=<nowiki>=IF(LEN(A2)=2, LEFT(A2, 1)&"O", LEFT(A2, 1)&REPT("O", 1)&RIGHT(A2, 1))</nowiki>}} also applied for 3 or 4 characters
 
 
 
=== case3: 王小明 --> 王OO; 孤獨求敗 --> 孤OO ===
Reserve the first character of name, and replace other characters with the symbol 'OO'.


== case1: 王小明 --> 王OO; 孤獨求敗 --> 孤OO ==
ex:  
ex:  
* 楊過 -> 楊OO
* 楊過 -> 楊OO
Line 12: Line 67:
methods
methods
* Excel:  
* Excel:  
** {{kbd | key=<nowiki>=REPLACE(A2, 2, LEN(A2)-1, "OO")</nowiki>}} also applied for 3 or 4 words
** {{kbd | key=<nowiki>=REPLACE(A2, 2, LEN(A2)-1, "OO")</nowiki>}} also applied for 3 or 4 characters
** {{kbd | key=<nowiki>=REPLACE(A2, 2, 2, "O")</nowiki>}} {{exclaim}} only applied for 3 words, NOT for 4 words
** {{kbd | key=<nowiki>=REPLACE(A2, 2, 2, "O")</nowiki>}} {{exclaim}} only applied for 3 characters, NOT for 4 characters
* MySQL:  
* MySQL:  
<pre>
<pre>
Line 24: Line 79:
</pre>
</pre>


== case2: 王小明 --> 王OO; 孤獨求敗 --> 孤OO敗 ==
=== case4: 王小明 --> 王OO; 孤獨求敗 --> 孤OO敗 ===
Replace the second and third characters with the symbol 'OO', and reserve other characters.
 
* 楊過 --> 楊OO
* 楊過 --> 楊OO
* 王小明 --> 王OO
* 王小明 --> 王OO
Line 53: Line 110:
-- SET @name := "Guo da-xia";
-- SET @name := "Guo da-xia";


SELECT CASE 
SELECT CONCAT(LEFT(@name, 1), 'OO', RIGHT(@name, CHAR_LENGTH(@name)-3));
    WHEN CHAR_LENGTH(@name) =2 THEN CONCAT(LEFT(@name, 1), 'OO')
    ELSE CONCAT(LEFT(@name, 1), 'OO', RIGHT(@name, CHAR_LENGTH(@name)-3))
    END;
</pre>
 
== case3: 王小明 --> 王O明; 孤獨求敗 --> 孤OO敗 ==
ex:
* 楊過 --> 楊O
* 王小明 --> 王O明
* 孤獨求敗 --> 孤OO敗
* Guo da-xia --> GOOOOOOOOa
 
methods:
* Excel:
** {{kbd | key=<nowiki>=IF(LEN(A1)=2, LEFT(A1, 1)&"O", LEFT(A1, 1)&REPT("O", LEN(A1)-2)&RIGHT(A1, 1))</nowiki>}}
** {{kbd | key=<nowiki>=REPLACE(A1, 2, 1, "O")</nowiki>}}<ref>[http://blog.xuite.net/yh96301/blog/80724141-Excel+2010%E5%A7%93%E5%90%8D%E7%9A%84%E7%AC%AC%E4%BA%8C%E5%80%8B%E5%AD%97%E5%8F%96%E4%BB%A3%E7%82%BAO Excel 2010姓名的第二個字取代為O @ 軟體使用教學 :: 隨意窩 Xuite日誌]</ref>  {{exclaim}} only applied for 3 words, NOT for 4 words
* PHP: using regular_replace
<pre>
if(mb_strlen($string, "UTF-8") == 2){
  echo mb_substr($string, 0, 1, "UTF-8") . "O";
 
}else{
  $pattern = '/^(\X)(\X+)(\X)/u';
  preg_match($pattern, $string, $matches);
  echo $matches[1]. str_repeat("O", mb_strlen($string, "UTF-8") - 2) . $matches[3];
 
}
</pre>
</pre>
* MySQL:
<pre>
SET @name := "楊過";
-- SET @name := "王小明";
-- SET @name := "孤獨求敗";
-- SET @name := "Guo da-xia";


SELECT CASE 
    WHEN CHAR_LENGTH(@name) =2 THEN CONCAT(LEFT(@name, 1), 'O')
    ELSE CONCAT(LEFT(@name, 1), REPEAT('O', CHAR_LENGTH(@name)-2), RIGHT(@name, 1))
    END;
</pre>




== 手機號碼的個資去識別化 ==
=== case1: 0912345678 --> 09123XXXXX8 ===


methods:
* Excel
** {{kbd | key=<nowiki>=LEFT(A2, 5)&REPT("X", 5)&RIGHT(A2, 1)</nowiki>}}


reference
== References ==
<references />
<references />


further reading
further reading
* [https://vtaiwan.tw/personal-data-protection/init/ 個資利用與去識別化 - vTaiwan.tw]
* [https://vtaiwan.tw/personal-data-protection/init/ 個資利用與去識別化 - vTaiwan.tw]
* [http://www.cc.ntu.edu.tw/chinese/epaper/0040/20170320_4008.html 淺談個資遮罩]
related terms
* [https://en.wikipedia.org/wiki/Data_masking Data masking] ([http://www.ithome.com.tw/tech/87443 資料遮罩])


[[Category:Data transformation]] [[Category:Data Science]] [[Category:Excel]]
[[Category:Data transformation]] [[Category:Data Science]] [[Category:Excel]]
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