A hands-on guide to iText 9 for Java developers, covering new PDF 2.0 encryption (AES-GCM, PDF MAC), digital signature verification, PDF/A/UA compliance, Maven setup, and practical code for text extraction, page-by-page parsing, and image export.
This article details a production-ready end-to-end encryption protocol for Spring Boot APIs using RSA-OAEP for key wrapping and AES-GCM for payload encryption, covering protocol specification, replay protection with Redis, key rotation strategies, filter-based decryption, testing failure paths, observability, and deployment validation.
This article presents ten interview‑style questions and detailed answers covering HTTPS handshake, certificate pinning, request signing, replay‑attack defenses, HMAC‑SHA256 vs RSA‑SHA256, AES‑CBC vs AES‑GCM, the limits of front‑end encryption, mTLS operation in micro‑services, key‑rotation design, and why HTTPS alone is insufficient, illustrating a comprehensive, layered security approach.
This article examines common pitfalls and misconceptions in field‑level encryption, explains why AES‑GCM and proper AAD are essential, outlines threat modeling, key hierarchy, blind indexing for searchable data, migration strategies, key rotation, performance considerations, and secure integration with MyBatis, Kubernetes, and Vault.
This article explains why encrypting sensitive fields like passwords, phone numbers, and ID numbers is essential, details a balanced approach using AES‑GCM encryption, HMAC indexes, and masked fields, and shares real‑world lessons from implementing the solution in a production system.
This guide presents a comprehensive, enterprise‑grade solution for encrypting phone numbers in databases, covering threat modeling, layered schema design, envelope encryption with KMS, Python service implementation, searchable indexes, key rotation, performance tuning, auditing, and common pitfalls.
