# Defenders now use prompt injection for protection

Security researchers and AI developers are adopting prompt injection techniques as a defensive tool to safeguard large language models. By deliberately injecting adversarial prompts during training, they can harden models against malicious inputs. This shift from attack-only to defensive use marks a significant evolution in AI security practices.

**Importance:** 3/5

## Sources

### Technology
- [Ars Technica](https://arstechnica.com/security/2026/07/now-defenders-are-embracing-the-prompt-injection-too/) — Mon, 13 Jul 2026 15:06:34 +0000