Soft-deleted HNSW embeddings are reconstructible from raw storage via Vec2Text inversion (up to 100% on structured data), addressed by epoch key rotation that reduces PII recovery to 0%.
Transformers can invert their inputs: Joint embeddings and inverse transformers for text reconstruction,
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Ghost Vectors: Soft-Deleted Embeddings Remain Reconstructible in HNSW Vector Databases
Soft-deleted HNSW embeddings are reconstructible from raw storage via Vec2Text inversion (up to 100% on structured data), addressed by epoch key rotation that reduces PII recovery to 0%.