Regarding HE: since the lookup is generated by the requestor, it can be used as an adversarial vector, which can result in exfiltration by nearest neighbor (clo

Regarding HE: since the lookup is generated by the requestor, it can be used as an adversarial vector, which can result in exfiltration by nearest neighbor (closest point to vector) methods. In other words, you can change what you are searching for, and much like differential power analysis attacks on crypto, extract information.