Data encryption is the cornerstone of healthcare security. It's the technical equivalent of a vault—even if an attacker gains physical access to your servers or intercepts your network traffic, they find only incomprehensible gibberish without the encryption keys. For developers building healthcare applications, understanding encryption isn't optional. It's the difference between a recoverable security incident and a catastrophic data breach affecting patient privacy. This guide walks through the cryptographic foundations you need to implement HIPAA-compliant encryption, from transport-layer protocols to database encryption to key management strategies. Why Encryption Matters in Healthcare A HIPAA violation involving unencrypted PHI typically results in: $100-$50,000 per record per violation FDA enforcement actions State medical board investigations Loss of patient trust and reputation damage Encryption doesn't eliminate the risk of a breach, but it dramatically reduces the consequences.…