Quantum secure direct communication with mutual authentication via rotation of an arbitrary basis
OwnerNayana DAS, Goutam Kumar PAULinventors
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Abstract
Approaches for implementing quantum secure direct communication (QSDC) with mutual authentication are described. In an example, an encoded sequence of single-qubit states corresponding to bits within a bit string message may be prepared. The sequence of the single-qubit states in turn are prepared based on a randomly selected arbitrary basis. The encoded sequence once prepared may be transmitted to a receiving system over a quantum communication channel.
Claims20
A quantum communication system, comprising:
- a quantum processing unit;
- an encoding engine coupled to the quantum processing unit, wherein the encoding engine is to:
- prepare an encoded sequence of single-qubit states corresponding to bits within a bit string message, wherein the sequence of the single-qubit states is prepared based on a randomly selected arbitrary basis and wherein the bit string message is based on an n-bit message to be transmitted to the receiving system;
- transmit the encoded sequence to a receiving system over a quantum communication channel;
- and
- further transmit, to the receiving system, positions of qubits of a sequence of single qubits for decoding the encoded sequence by the receiving system.
A method, comprising:
- receiving by a receiving system over a quantum communication channel, an encoded sequence of single-qubit states corresponding to bits within a bit string message, wherein the sequence of the single-qubit states is prepared based on a randomly selected arbitrary basis and wherein the bit string message is based on an n-bit message;
- receiving from a transmitting system information pertaining to position of qubits within a sequence Qθ;
- measuring the qubits within the sequence Qθ on bases corresponding to an authentication identity of the receiving system;
- deriving value of θ based on the measuring of the qubits within the sequence Qθ;
- deriving a modified message sequence Q1A based on the measured qubits;
- and
- based on the modified message sequence Q1A determining the n-bit message.
A non-transitory computer-readable medium comprising computer-readable instructions being executable by a quantum processing resource to:
- prepare an encoded sequence of single-qubit states corresponding to bits within a bit string message, wherein the sequence of the single-qubit states is prepared based on a randomly selected arbitrary basis and wherein the bit string message is based on an n-bit message to be transmitted to the receiving system;
- transmit the encoded sequence to a receiving system over a quantum communication channel;
- and
- further transmit, to the receiving system, positions of qubits of a sequence of single qubits for decoding the encoded sequence by the receiving system.
Dependencies are inferred from the claim text.