transparent-encrypted-storage-pattern

name	transparent-encrypted-storage-pattern
description	Security pattern for full-disk or database-level encryption at rest. Use when implementing Transparent Data Encryption (TDE), full-disk encryption, or when storage infrastructure should handle encryption without application changes. Addresses "Leak data at rest" problem.

Transparent Encrypted Storage Security Pattern

Storage infrastructure automatically encrypts all data before writing to disk and decrypts when reading. Application is unaware of encryption—it happens transparently at the storage layer.

Problem Addressed

Leak data at rest: All stored data could be exposed through physical theft, backup compromise, or unauthorized storage access.

Core Components

Role	Type	Responsibility
Application	Entity	Reads/writes data normally
Storage Manager	Entity	Intercepts I/O, manages encryption
Cryptographer	Cryptographic Primitive	Performs encryption/decryption
Physical Storage	Storage	Stores encrypted data
Key Manager	Entity	Manages encryption keys

Data Elements

• data: Plaintext data from application
• {data}_k: Encrypted data on disk
• key: Encryption key (managed by infrastructure)

Pattern Flow

Write Operation

Application → [write(data)] → Storage Manager
Storage Manager → [encrypt(data)] → Cryptographer
Cryptographer → [{data}_k] → Storage Manager
Storage Manager → [write({data}_k)] → Physical Storage