Editing Secure Multiparty Delegated Classical Computation (section)

===Main Routine===

# The server generates an ancilla bit <math>|0\rangle</math> and sends it to client <math>C_1</math>.
# For <math>i = 1</math> to <math>n-1</math>:
## <math>C_i</math> applies <math>V^{r_i}U^{x_i}</math> on the received qubit and sends it to client <math>C_{i+1}</math>.
# <math>C_n</math> applies <math>V^{r_n}U^{x_n}</math> on the received qubit.
# Any client then applies <math>(U^\dagger)^{\oplus_i x_i}</math>. <br/> <math>(U^\dagger)^{\oplus_i x_i} \underbrace{V^{r_n}U^{x_n}}_{\mathcal{C}_n}  ... \underbrace{V^{r_2}U^{x_2}}_{\mathcal{C}_2} \underbrace{V^{r_1}U^{x_1}}_{\mathcal{C}_1} |0\rangle= |r \oplus f\rangle </math>
# The resulting state is now sent to the server who measures the outcome <math>r \oplus f</math> and announces it.
# The clients locally compute XOR of the random bits of other clients.
# They then perform the operation <math>f = r \oplus (r \oplus f)</math> to get the result.