Simple data anonymization

Simple data anonymization 簡易個資去識別化

case1: 王小明 --> 王O明

ex: 王小明 --> 王O明

• Excel:
  • =REPLACE(A2, 2, LEN(A2)-2, O) also applied for 3 or 4 words ex: 王王小明 -> 王O明
  • =REPLACE(A2, 2, 1, O) only applied for 3 words, NOT for 4 words
• PHP: using regular_replace

$string = '王小明';
$pattern = '/^(\X)(\X)(\X+)/u';
$replacement = '$1O$3';
echo preg_replace($pattern, $replacement, $string);

• MySQL: using SUBSTRING

SELECT CONCAT(SUBSTRING_INDEX('王小明', SUBSTRING('王小明', 2, 1), 1), 
SUBSTRING('王小明', 2, 1),
SUBSTRING_INDEX('王小明', SUBSTRING('王小明', 2, 1), -1));

case2: 王小明 --> 王OO

ex: 王小明 --> 王OO

• Excel:
  • =REPLACE(A2, 2, LEN(A2)-1, O) also applied for 3 or 4 words ex: 王王小明 -> 王OO
  • =REPLACE(A2, 2, 2, O) only applied for 3 words, NOT for 4 words
• MySQL: SELECT CONCAT(LEFT("王小明", 1), 'OO')

reference

further reading

• 個資利用與去識別化 - vTaiwan.tw