SentinelGate

SentinelGate is a cryptographic security layer designed to prevent adversarial prompt injections and unauthorized tool hijacks at the earliest stage of AI processing (Token 0). It provides in-memory prompt evaluation with sub-millisecond overhead, tamper-evident Ed25519-signed attestation bags, zero prompt retention, and compatibility with OpenAI SDKs. Targeted at high-stakes AI use cases including financial applications compliant with ISO 20022.