Secure Client- Server Delegated Computation: Difference between revisions

It involves a partially classical Client exchanging performing both classical and quantum communication with the Server during the preparation stage and output correction. There is no communication between the two parties during computation stage. Client hides her input states with the help of some classical encryption using [[Supplementary Information#Homomorphic Encryption|HE]] and some quantum gadgets. Server performs computation on the encrypted state using these quantum gadgets. Later Client decrypts the outcome sent by Server to get the correct result. Protocols falling under this category are Quantum Fully Homomorphic Encryption (QFHE) Just like UBQC, QFHE protocols can also be realised by a [[Prepare and Send Quantum Fully Homomorphic Encryption|Prepare and Send QFHE]] protocol where client prepares and sends the input states to the Server. If the task performed by the Server can be verified by the Client, the protocol is called, Verifiable Quantum Fully Homomorphic Encryption [[Verifiable Quantum Fully Homomorphic Encryption (VQFHE). Same as QFHE, VQFHE can be realised by [[Prepare and Send Verifiable Quantum Fully Homomorphic Encryption|Prepare and Send VQFHE]]. For both QFHE and VQFHE, Measurement Only protocols are an open case.

It involves a fully classical Client exchanging classical messages with the server only during the preparation and output correction phase. There is no communication during computation phase. It uses only classical [Supplementary Information#Homomorphic Encryption|HE] and no quantum gadgets to realize a quantum functionality. Protocols falling under this category are Classical Fully Homomorphic Encryption [[Classical Fully Homomorphic Encryption for Quantum Circuits|(FHE) for Quantum Circuits]]. A verification of FHE for Quantum Circuits protocol is still an open question

  '''Tags:''' [[Two Party Protocols|Two Party]], [[Universal Task|Universal Task]], [[Quantum Functionality|Quantum Functionality]], [[Multiparty Delegated Quantum Computation|Multiparty Delegated Quantum Computation]], [[Quantum Enhanced Classical Delegated Computation|Quantum Enhanced Classical Delegated Computing]]