LLM Prompt Security Best Practices
An employee pastes a customer contract into ChatGPT to summarize it. Nothing gets attached, nothing crosses the network in a file, and no alert fires. That is the gap most LLM security advice does not address. Prompt security is not the same problem as prompt injection or model hardening. It is a data problem consisting of what enters a prompt, what an agent does with it, and what comes back out.