Prepare-and-Send Verifiable Quantum Fully Homomorphic Encryption: Difference between revisions

** Majority of the single-qubit and two-qubit quantum states are encrypted using the global permutation. A [[CSS]] concatenated Steane code is selected with specific requirements. The quantum state is first encoded using this CSS code which results in a state with $m$ qubits. Then, $m$ computational and $m$ Hadamard traps (<math>|0\rangle</math> and <math>|+\rangle</math> states) are added to that state and the resulting state is permutated using the global permutation. Next, if $n$ is the number of qubits that will be encrypted, two bits strings are picked of length $n$ to encrypt the state with [[Quantum one time pad]]. After this, we obtain our magic state for that particular quantum state. Here it is important to note that the keys for [[Quantum one time pad]] are selected during Encryption rather than Key Generation.