Jack LeBlanc

Jack LeBlanc

Member since March 2026

1 stories
433 votes received

Stories by Jack LeBlanc

  1. 433
    Security Fiction

    Built a "prompt injection proof" system. A user broke it in 20 minutes with a grocery list.

    I built an internal tool that let employees query our HR policy documents using an LLM. I was very proud of my security. I had: - A system prompt explicitly telling the model to o…