Method for sending a deterministic bit string from a sending computer of a plurality of N classical computers (CCn) to a receiving computer of said set of N classical computers (CCn), wherein the N classical computers (CCn) are respectively coupled to N quantum computers (QCn) having respectively N locations within a quantum network and two locally-separable Hilbert spaces, characterized in that it comprises: - a first step comprising defining, at the location of the sending computer, from the deterministic bit string, a first state | Ψ D 〉 n for a first Hilbert space at the location n of the quantum computer (QCn) coupled to the receiving computer with an adjoining operator p̂ n = (| Ψ D 〉〈 Ψ D | n + | Ψ SO 〉〈 Ψ SO | n 2), wherein the spin-off state | Ψ SO 〉n2 may be created in a second Hilbert space at location n by applying the operator p̂ n on the first state | Ψ D 〉 n; - a second step comprising defining at the location of the sending computer N-1 other first states | Ψ D 〉 n, for a first Hilbert space at N-1 other locations and defining an entangled state | Ψ MD 〉 from said first state | Ψ D 〉 n and said N-1 other first states | Ψ D 〉 n,; - a third step in which i) said operator p̂ n and a definition of a protocol intended for retrieving said deterministic bit string are publically transmitted to the receiving computer, and ii) said entangled state | Ψ MD 〉 is set-up into said N quantum computers (QCn) via said quantum network, wherein the quantum network is a carrier of the entangled state | Ψ MD 〉 with said N quantum computers (QCn) forming N end-points of the entangled state | Ψ MD 〉 n; and - a fourth step in which i) the quantum computer (QCn) coupled to the receiving computer (CCn) applies P times said operator p̂ n on the locally first state | Ψ D 〉 n resulting from the entangled state | Ψ MD 〉 set-up to obtain P spin-off states | Ψ SO 〉 n2 in the second Hilbert space at location n, and ii) said receiving computer (CCn) determines an average result from said P obtained spin-off states | Ψ SO 〉 n2 and applies said transmitted protocol to said determined average result to retrieve said deterministic bit string. - a first step comprising defining, at the location of the sending computer, from the deterministic bit string, a first state | Ψ D 〉 n for a first Hilbert space at the location n of the quantum computer (QCn) coupled to the receiving computer with an adjoining operator p̂ n = (| Ψ D 〉〈 Ψ D | n + | Ψ SO 〉〈 Ψ SO | n 2), wherein the spin-off state | Ψ SO 〉n2 may be created in a second Hilbert space at location n by applying the operator p̂ n on the first state | Ψ D 〉 n; - a second step comprising defining at the location of the sending computer N-1 other first states | Ψ D 〉 n, for a first Hilbert space at N-1 other locations and defining an entangled state | Ψ MD 〉 from said first state | Ψ D 〉 n and said N-1 other first states | Ψ D 〉 n,; - a third step in which i) said operator p̂ n and a definition of a protocol intended for retrieving said deterministic bit string are publically transmitted to the receiving computer, and ii) said entangled state | Ψ MD 〉 is set-up into said N quantum computers (QCn) via said quantum network, wherein the quantum network is a carrier of the entangled state | Ψ MD 〉 with said N quantum computers (QCn) forming N end-points of the entangled state | Ψ MD 〉 n; and - a fourth step in which i) the quantum computer (QCn) coupled to the receiving computer (CCn) applies P times said operator p̂ n on the locally first state | Ψ D 〉 n resulting from the entangled state | Ψ MD 〉 set-up to obtain P spin-off states | Ψ SO 〉 n2 in the second Hilbert space at location n, and ii) said receiving computer (CCn) determines an average result from said P obtained spin-off states | Ψ SO 〉 n2 and applies said transmitted protocol to said determined average result to retrieve said deterministic bit string.