Data Masking and Tokenisation Testing: Verifying Data Protection Controls — 日本企業向けガイド

Data masking and tokenisation are foundational data protection controls — but they're only effective if implemented correctly across all data access paths. Testing verifies: are all instances of sensitive data masked (database queries, API responses, error messages, logs, exports, backups)?; can masked or tokenised data be reversed without authorisation?; does masking persist across all application layers (a value masked in the UI might be exposed in the API)?; and are development and testing environments using properly masked production data rather than real sensitive data?