How we built security into Comet from day one

Comet describes a multilayered security strategy for protecting its web-browsing AI assistant from evolving prompt injection and related attacks, emphasizing that overlapping safeguards are necessary because no single defense is sufficient. Before its public launch, the company commissioned Trail of Bits to conduct threat modeling and adversarial testing, which identified vulnerabilities that were addressed through iterative remediation. It later published its four-layer defense architecture and launched bug bounty efforts, then open-sourced BrowseSafe, including a detection model and a benchmark with 14,719 examples spanning multiple attack types, injection strategies, and linguistic styles. The account emphasizes lessons from external testing, continuous threat modeling, transparent research, and industry collaboration, while stating that Comet will continue regular security assessments, disclosure programs, and scaled investments as the assistant handles more sensitive user tasks.

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