Patent ID: 11956351
Assignee: CABLE TELEVISION LABORATORIES, INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A first node for encrypted data transmission in a network, comprising:
a quantum receiver configured to:
receive a plurality of qubits transmitted to the first node by a second node of the network; and
measure the plurality of qubits to generate a plurality of measurement results;

a classical transceiver configured to classically communicate with the second node;
an initial-key generator configured to derive an initial key based on the plurality of measurement results;
a key-series generator configured to:
receive, via the classical transceiver, a series of encrypted keys;
decrypt, with the initial key, a first encrypted key of the series of encrypted keys to generate a first unencrypted key of a respective series of unencrypted keys; and
decrypt each subsequent encrypted key of the series of encrypted keys with a preceding unencrypted key of the series of unencrypted keys to generate a subsequent unencrypted key of the series of unencrypted keys; and

one or both of a decryptor and an encryptor, wherein:
the decryptor is configured to decrypt, using a last unencrypted key of the series of unencrypted keys, encrypted data received from the second node via the classical transceiver; and
the encryptor is configured to encrypt, using the last unencrypted key, unencrypted data to be transmitted to the second node via the classical transceiver.