May 12, 2026 · Information Security

High-Concurrency Phone Encryption: Blind Index, KMS Management & Rotation

This article presents a production‑grade solution for encrypting phone numbers in high‑concurrency microservices, combining random AES‑GCM ciphertext with HMAC‑based blind indexes, multi‑version KMS‑managed keys, zero‑downtime key rotation, and detailed component designs to ensure confidentiality, exact searchability, and operational stability.

Database SecurityEncryptionJava

0 likes · 40 min read

High-Concurrency Phone Encryption: Blind Index, KMS Management & Rotation

21CTO

Jun 6, 2017 · Information Security

How to Search Encrypted Database Fields Securely with Blind Indexes

This article explains why deterministic encryption like ECB is unsafe for sensitive data, introduces nondeterministic authenticated encryption, and provides a practical blind‑index technique with PHP and SQL examples for searchable encryption of fields such as Social Security numbers.

Database SecurityEncryptionPHP

0 likes · 14 min read

blind-index

High-Concurrency Phone Encryption: Blind Index, KMS Management & Rotation

How to Search Encrypted Database Fields Securely with Blind Indexes