Data Masking Components: Generic Phone Nu Dynamic

This version functions similarly to the random variant, masking numeric digits while preserving all original separators, formatting characters and first digits (phone Number length - 7). It supports phone numbers of variable length (9-15), but it adds referential integrity: the same original phone number will always produce the same masked output within a dataset.

Examples:

+44 20 7946 0958 → +44 20 4162 3057
+44 20 7946 0958 → +44 20 4162 3057
0034.912.345.678 → 0034.204.837.591
+49-89-636-48018 → +49-89-382-60214

Key features:

Preserves all special characters (e.g., +, -, ., (, ), spaces) as they appear in the input
Only replaces numeric digits
Does not allow alphabetic characters in the input
Preserving first 4 digits
Min – 9 digits. Max - 15 digits
Same input → same output within the masked result set

The length and structure of the phone number are maintained by preserving the number of digits and position of separators. This allows for realistic-looking masked numbers while protecting the original values.

Algorithm

Variation of Random Character Permutation Algorithm

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Data Masking Components: Generic Phone Nu Dynamic

1. Generic Phone Nu Dynamic
1.1 Purpose
1.2 Algorithm

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