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Y-00 quantum noise stream encryption transmission method with low bit error rate

A technology with quantum noise and low bit error rate, applied in encryption devices with shift registers/memory, transmission systems, optical transmission systems, etc., can solve problems such as insufficient transmission rate and insufficient distance, and achieve cost improvement , avoid high energy consumption, and reduce the effect of bit error rate

Active Publication Date: 2020-06-26
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] In view of this, the object of the present invention is to propose a Y-00 quantum noise stream encryption transmission method with a low bit error rate, so as to solve the problem that the distance is not far enough and the transmission rate is not good enough in the existing safe optical communication transmission

Method used

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  • Y-00 quantum noise stream encryption transmission method with low bit error rate
  • Y-00 quantum noise stream encryption transmission method with low bit error rate
  • Y-00 quantum noise stream encryption transmission method with low bit error rate

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Embodiment

[0116] Such as Figure 9 , 10 As shown in and 11, it is a Y-00 quantum noise stream encryption transmission method with low bit error rate, including:

[0117] Step 1: Forward Error Correction Coding—Using the (60000, 53570) sized LDPC code generation matrix F to perform FEC forward error correction coding on the BPSK signal S containing information. The coded signal SF=S×F is obtained.

[0118] Step 2: Y-00 encryption——through the Y-00 protocol, perform quantum noise stream encryption on the encoded information sequence SF, and use the encryption format of 1-bit information and 10-bit basic information. Bases B1 to 10 are ten groups of mutually uncorrelated ten-digit sequences, assign a random base to each bit of SF, make it XOR with the first bit of the base, and replace the tenth bit of the dropped base with the result obtained, use The resulting sequence of ten bits represents the transmitted bit symbols, and the choice of the corresponding base for each bit symbol repr...

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Abstract

The invention provides a Y-00 quantum noise stream encryption transmission method with a low bit error rate. The method comprises the steps that a transmitting end carries out the forward error correction coding of an information sequence modulated by BPSK through a generation matrix of a low-density parity check code, and obtains a coded information sequence; the sending end performs Y-00 encryption on bits in the coded information sequence bit by bit through the base sequence to obtain a plurality of encrypted coded information sequences; the sending end performs QAM modulation on the plurality of encrypted coded information sequences; the sending end performs OFDM modulation and parallel-serial conversion on each orthogonal subcarrier and transmits the orthogonal subcarriers; a receiving end receives the signals, and performs serial-parallel conversion and OFDM demodulation; the receiving end demodulates the plurality of orthogonal subcarriers QAM to obtain a plurality of encryptedcoded information sequences; the receiving end performs Y-00 decryption on the plurality of encrypted coded information sequences through the base sequence to obtain an information sequence subjectedto BPSK modulation; and the receiving end performs iterative computation through an LDPC FEC decoder to obtain an information sequence to be transmitted.

Description

technical field [0001] The invention relates to the technical field of safe optical communication, in particular to a Y-00 quantum noise flow encryption transmission method with low bit error rate. Background technique [0002] Secure optical communication has developed rapidly in the world in recent years. It is a new optical communication technology for the purpose of resisting line or node eavesdropping attacks, and it is a means of enhancing the ability to resist interception of information. It belongs to the research category of optical network physical layer security. [0003] The current basic methods for secure optical communication can be divided into two categories: one is the theory of quantum key distribution, and the other is the theory of physical layer security. One of the mainstream methods is Quantum Stream Noise Cryptography (QNSC) optical communication. QNSC is a highly secure physical layer encryption technology. By subdividing the physical state of the...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04L25/02H04L27/26H04L1/00H04L9/18H04B10/85
CPCH04B10/85H04L1/0061H04L9/065H04L9/0852H04L25/0202H04L27/2601H04L27/2678
Inventor 李亚杰张杰章明瑞雷超张会彬
Owner BEIJING UNIV OF POSTS & TELECOMM
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