| 摘要 |
In an embodiment, an apparatus comprises a processor, and a memory that s tores a program. The program, when executed by the processor, directs the pr ocessor to perform a method including the following steps: receiving an encr ypted query, in which the query indicates at least one security, and at leas t one price; determining whether the encrypted query corresponds to any orde r in an encrypted data set that represents orders; outputting a response to the query, in which the response indicates whether the encrypted query corre sponds to any order in an encrypted data set that represents orders; receivi ng order data that represents the orders; and encrypting the order data to y ield the encrypted data set that represents orders. |
