hadamask

About

A Python library that protects data stored in vector databases on the client side. It applies a secret orthogonal transform to embeddings, so similarity scores match those on the clear vectors, and encrypts metadata with AES-256-GCM. It supports nine vector databases plus LangChain and LlamaIndex. The embedding transform is obfuscation with measured leakage, not encryption, and the project is alpha without an external audit.