Field-level encryption secures data at the most granular level. Instead of encrypting entire databases or tables, you encrypt individual fields. This means that even if someone gains access to your system, the most sensitive information remains unreadable without the correct keys.
When paired with a Non-Disclosure Agreement (NDA), the technical security is backed by legal force. The NDA defines who can see decrypted data, under what conditions, and with what penalties for breach. Together, these tools reduce your attack surface in both code and law.
A proper field-level encryption NDA strategy starts with clear policy. Identify which fields need the strongest protection—passwords, payment details, personal identifiers. Map which systems touch these fields and where encryption and decryption will occur. Store encryption keys separately from the data store and, ideally, in a hardware security module or a managed key vault service.
Your NDA should reference encryption standards explicitly. Define acceptable ciphers, key lengths, and rotation schedules. Make sure the agreement covers both storage and transit, since decrypted views, exports, or logs can create new vulnerabilities. Audit access logs regularly and link violations directly to NDA terms.