Cloud Architecture

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.