PII Masking vs Data Encryption: What's the Difference for AI APIs? (opens in new tab)

When developers realize their AI prompts contain sensitive data, the first instinct is usually: "I'll just encrypt it." It makes sense. Encryption is the universal answer to data protection. Encrypt at rest, encrypt in transit, encrypt end-to-end. Follow that playbook and you're safe. Except with AI APIs, encryption at the wrong layer doesn't just fail to protect your data — it makes the AI completely useless. Here's the technical breakdown of why encryption breaks AI, why hashing doesn't wor...