Abstract: As the quantum random number generators are gaining in popularity, especially with regard to possibility of construction of a scalable quantum computer, a new invention is proposed in this area based upon topological properties of quantum entanglement. The proposed Entanglement Quantum Random Number Generator (Entanglement QRNG) uses a certain multi-qubits entanglement of quantum states to produce randomness with public certification.

Abstract: The One-Qubit Pad (OQP) protocol and its generic implementing device constitute a novel, maximally efficient scheme for encryption of quantum information with a quantum key of just a single qubit in an arbitrary unknown quantum state. The OQP enables encryption of the quantum information of n qubits register with a single qubit key upon provision of a multi-qubit entanglement between the single qubit key and the n qubits of the quantum message by the iterative application of the CNOT gate on the same key qubit (control input) and subsequent qubits of the message (target input). This results in an entanglement of all n+1 qubits, which locks original quantum information qubits and the single qubit of the key in a jointly entangled state that cannot be disentangled without the single qubit key.