---
title: Data substitution methods
description: "Data substitution methods\nMasking, tokenization, or substitution\nWhen anonymizing or pseudonymizing sensitive data in your documents, Nymiz offers three substitution methods:\nMasking: Data is hidden with asterisks or blacklining (black boxes).\n\n\nTokenization: Data is replaced with tokens composed of a prefix indicating the infotype (PER, LOC, WEB, DAT) and a number (to differentiate them).\n\n\nSynthetic Data Substitution: Data is replaced with other values of the same nature and length. Example: if the original is a male name with surnames, it will be replaced by another male name with surnames, matching the same number of characters.\n\n\nBy selecting any of these methods, you can generate a fully anonymized document tailored to the specific outcome you need in each case."
---

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# Data substitution methods

## Masking, tokenization, or substitution

When anonymizing or pseudonymizing sensitive data in your documents, Nymiz offers three substitution methods:

- **Masking:** Data is hidden with asterisks or blacklining (black boxes).
- **Tokenization:** Data is replaced with tokens composed of a prefix indicating the infotype (PER, LOC, WEB, DAT) and a number (to differentiate them).
- **Synthetic Data Substitution:** Data is replaced with other values of the same nature and length. *Example: if the original is a male name with surnames, it will be replaced by another male name with surnames, matching the same number of characters.*

By selecting any of these methods, you can generate a fully anonymized document tailored to the specific outcome you need in each case.

 

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