データマスキング

データ masking (also known as data obfuscation or data anonymization) is ... process of hiding or replacing sensitive data ... placeholder characters such as asterisks (*). It protects personal in...mation like phone numbers, email addresses, ID card numbers, および credit card numbers while maintaining ... data ...mat ... display or testing purposes.

Select a masking type (Phone, Email, ID Card, Credit Card, Bank Card, Name, Address, or Custom), ...n enter ... data you want to mask — one item per line. Click ... Mask button to process. The tool will detect matching patterns および replace ... sensitive portions ... asterisks. You can load sample data by clicking ... Example button.

Phone: Masks ... middle 4 digits of phone numbers (e.g., 138****5678). Email: Keeps ... first 2 characters および masks ... rest be...e ... @ symbol (e.g., zh***@example.com). ID Card: Masks ... middle portion of ID numbers (e.g., 110101********1234). Credit Card: Shows only ... last 4 digits (e.g., **** **** **** 0001). Bank Card: Shows only ... last 4 digits (e.g., **********0123). Name: Keeps ... first および last characters ... longer names (e.g., Z***g). Address: Keeps roughly 30% at ... start および 20% at ... end. Custom: Define your own regex pattern および replacement string.

For advanced use cases, select ... Custom type および provide a JavaScript-compatible regular expression pattern および replacement string. The replacement supports capture groups using $1, $2, etc. For example, pattern (\d{3})\d+(\d{3}) ... replacement $1****$2 will keep ... first および last 3 digits while masking ... middle.