Six Common Data Masking Techniques: From Simple String Replacement to K‑Anonymity
This article presents six practical data‑desensitization methods—including string replacement, encryption, database masking, cache‑based replacement, dynamic AOP masking, and K‑anonymity—explains their principles, shows Java implementations, compares security, performance, and reversibility, and offers concrete recommendations for protecting sensitive fields such as phone numbers and ID cards.