Research on secure encryption method of multi-domain fiber network based on particle swarm optimization algorithm

Abstract

In order to improve the security of information storage in multi-domain optical network privacy protection, hybrid encoding and encryption of privacy protection information in multi-domain optical network is carried out. A hybrid coding and secure encryption technique based on particle swarm optimization (PSO) for privacy protection information in multi-domain optical network is proposed. The coding mapping equation of privacy protection information security encryption in multi-domain optical network is constructed, and the privacy protection information of multi-domain fiber network is loaded into the coding mapping equation of security encryption of privacy protection information in multi-domain fiber network. A set of characteristic solutions describing the entropy function of the characteristic distribution of random encryption keys are obtained, and the elliptic mapping random linear combination coding and chaotic encryption key allocation are carried out. The privacy protection method of multi-domain optical fiber network is used to encrypt and decode information with mixed coding and steganography. Under the bilinear mapping coding system, the privacy-protected information in multi-domain optical network is encrypted and encrypted, stored and transmitted confidently. The simulation results show that this encryption technique has better steganography performance and better secure transmission and storage performance for the privacy protection information mixed encoding encryption in multi-domain optical network.

Keywords

Particle swarm optimization algorithm multi-domain fiber optic network secure encryption

1. Introduction

Multi-domain optical fiber network is a network platform which uses optical fiber communication technology to realize the information transmission of privacy protection information network. The optical fiber sensor is used to construct the multi-domain optical fiber network information platform. The performance of data privacy protection can be improved by transmitting privacy-protected information in multi-domain optical fiber network in small storage space. Due to the openness of multi-domain optical network and multi-dimensional organization network, the data is easy to be leaked in storage and transmission, which leads to poor data privacy protection performance of multi-domain fiber optic network [1]. It is necessary to design the privacy protection information of multi-domain optical fiber network by hybrid coding and encryption, which can improve the security of network transmission by combining the mass information transmission encryption and coding design of multi-domain optical network. It is of great significance to study the hybrid coded encryption algorithm for privacy protection in multi-domain optical fiber networks to improve the security of data and the security ofstorage [2].

Due to the simple structure of information combination of privacy protection in multi-domain optical network and the self-correlation and mutual coupling of data combination in multi-domain optical network, the risk of privacy leakage in data encryption and storage using digital certificate combination encryption method. In traditional methods, there are chaotic encryption methods, exhaustive search privacy protection methods based on public key encryption and elliptic linear encryption methods, etc., for privacy-protected information encryption in multi-domain optical fiber networks. In this paper, a privacy-protected information encryption method based on elliptic curve cryptosystem (ECC) in multi-domain optical fiber networks is proposed, which is based on the association map coding [3]. The SuLQ framework is introduced in this paper, and the privacy-protected information encryption method in multi-domain optical networks is presented in this paper. Using ECC to implement privacy hybrid encoding encryption, but the computation cost of this algorithm is large, and the performance of privacy data encryption is not good [4]. A privacy data encryption method for optical sensor networks based on the representation of sensitive information in ciphertext domain is proposed, and the chaotic encryption design of the extracted features is carried out in the ciphertext domain [5]. Privacy encryption is realized by combining privacy protection information fusion with linear coding scheme, but the performance of adaptive forwarding for data encryption is notgood [6].

In order to solve the above problems, this paper proposes a hybrid coding and encryption technique for privacy protection information of multi-domain optical network based on particle swarm optimization (PSO) algorithm. Firstly, the privacy protection information of the multi-domain optical network is loaded into the coding mapping equation of the secure encryption of the privacy protection information of the multi-domain fiber network, and the elliptic mapping random linear combination coding design and chaotic encryption key configuration are carried out. Then, the privacy protection method of multi-domain optical network is used to encrypt and decode the information in the mixed coding and decoding, and the encryption steganography and the secret storage and transmission of the information in the multi-domain optical network are realized under the bilinear mapping coding system. Finally, experiments are carried out to demonstrate the advantages of this method in improving the performance of hybrid coding and encryption for privacy protection information in multi-domain optical fiber networks.

2. Privacy protection information encryption key state characteristics analysis and storage distribution design

2.1. Analysis of encryption key state characteristics of privacy-protected information

In order to realize the design of hybrid coding encryption of privacy protection information in multi-domain optical fiber network, firstly, chaotic linear coding technology is used to construct bit sequence stream, which represents the privacy protection information of multi-domain optical fiber network. The combined spatial structure model is used to design the transmission channel model of privacy protection information in multi-domain optical fiber network. Taking M as the value of block length, the privacy protection information of multi-domain optical network is encrypted by multi-layer linear encryption [7]. The detection length of data information encryption is M. In the block of linear encrypted packet bits, the privacy protection information of multi-domain optical network is divided into bit sequences by binary programming design using linear programming algorithm. The bit sequence stream is divided into $N = ⌊ \frac{n}{M} ⌋$ time windows. By using the block feature matching technique, the binary P-value of mixed encoding and encryption for privacy protection information in multi-domain optical network is defined as follows. $\begin{array}{l} P - value = igamc (N/2, χ^{2} (obs) /2) \\ = \frac{1}{Γ (N/2)} \int_{χ^{2} (o b s) / 2}^{\infty} e^{- t} t^{N / 2 - 1} d t \end{array}$ (1)

Where, $Γ (N / 2) = \int_{0}^{\infty} t^{N / 2 - 1} e^{- t} dt$ , assumes that the plaintext number of the privacy protection information of the multi-domain optical network to be encrypted is $X = (0, \frac{1}{M}, \frac{2}{M}, \dots, 1)$ , packet forwarding and the random distribution probability is the detection feature of the (π₁, π₂, π₃, …, π_N), coded sequence, which is P = (p₀, p₁, p₂, …, p_M), according to the above analysis. The block encryption model of privacy protection information in multi-domain optical network is obtained as shown in Fig. 1.

Fig. 1.

Block encryption model for privacy protection information in multi-domain optical networks.

According to the encryption model shown in Fig. 1, the data distributed storage structure and mixed encoding encryption are designed [8], and the wavelet entropy characteristic distribution equation of privacy protection information in multi-domain optical network is constructed as: $(\begin{matrix} a & b & c & d \\ d & a & b & c \\ c & d & a & b \\ b & c & d & a \end{matrix}) (\begin{matrix} a & b & c & d \\ d & a & b & c \\ c & d & a & b \\ b & c & d & a \end{matrix}) = (\begin{matrix} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{matrix})$ (2)

By using elliptic curve block encryption method, the encoding mapping equation of ${\begin{matrix} a^{2} + c^{2} = 1 \\ b^{2} + d^{2} = 0 \end{matrix}, {\begin{matrix} g^{2 α} + g^{2 γ} = 1 \\ g^{2 β} + g^{2 ρ} = 0 \end{matrix}$ which satisfies the first character of plaintext sequence, is used to construct the secure encryption of privacy protection information in multi-domain optical fiber network, because the first character of the plaintext sequence satisfies g^2β + g^2ρ = 0, 1 ≤ β. The privacy protection information of multi-domain optical network is loaded into the coding mapping equation of security encryption of multi-domain optical network privacy protection information, and the coding mapping equation of privacy protection information security encryption of multi-domain optical fiber network is obtained as: $\begin{array}{l} c = z \cdot ⌊ \frac{x_{0}}{2} ⌋ = (q_{p} (z) p + r_{p} (z)) \cdot ⌊ \frac{x_{0}}{2} ⌋ \\ = q_{p} (z) p \cdot ⌊ \frac{x_{0}}{2} ⌋ + r_{p} (z) \cdot ⌊ \frac{x_{0}}{2} ⌋ \end{array}$ (3)

The privacy protection information of multi-domain optical fiber network is applied to digital signature, and each group of information is matched by feature group. Thus, the secret key state feature reconstruction and state analysis of privacy protection information encryption are realized [9].

2.2. Feature extraction of feature Distribution entropy function of random encryption key

The coding mapping equation of privacy protection information security encryption in multi-domain optical fiber network is constructed, and the privacy protection information of multi-domain optical fiber network is loaded into chaotic key protocol [10]. A random sampling method is used to obtain τ + 1 sequences of bits to be encrypted for privacy protection information in multi-domain optical fiber networks x₀, x₁, …, x_τ, combined with vector quantization (VQ) coding. The encryption protocol is as follows: $parity (r_{p} (z)) = Decrypt (sk, c)$ (4)

$parity (q_{p} (z)) = parity (r_{p} (z)) \oplus parity (z)$ (5)

The number of code elements in the link layer is calculated. The random chaotic encryption method is used to obtain the shift transformation of the data encryption distribution into the chaotic sequence e : G₁ × G₁ → G₂, generated by the g, g₂, g₃ ∈ G₁, Logistic map for the privacy protection information of the multi-domain optical fiber network [11]. A standard normal distribution model is used to decompose the data features, and the key conversion model is obtained as follows:

Encrypt (pk, m_i,j ∈ { 0, 1 } ^μ×μ) _1≤i,j≤μ, the resulting ciphertext satisfies:

While $1 \leq i \leq τ, x_{i} \mod p_{j} = 2 r_{i, j} \cdot$

While $0 \leq i \leq l - 1, {x^{'}}_{i} \mod p_{j} = 2 {r^{'}}_{i, j} + δ_{i, j} \cdot$

While $0 \leq i \leq l - 1, Π_{i} \mod p_{j} = 2 ϖ_{i, j} + δ_{i, j} \cdot$

$2^{φ^{'} + 1}$ . According to the feature extraction results of the entropy function of the random encrypted key feature distribution, the ciphertext t_i = H₁ (ID_i, upk_i) of privacy protection information in multi-domain optical fiber network is obtained by using the intra-block frequency detection method: ${dsk}_{{ID}_{i}} = ({sk}_{i 1}, {sk}_{i 2}) = (g_{2}^{a} (g_{1}^{t_{i}} h)^{u_{i}}, g^{u_{i}})$ (6)

${rsk}_{{ID}_{i}} = ({sr}_{i} = g_{1}^{u_{i}})$ (7)

According to the feature extraction results of the characteristic distribution entropy function of the random encryption key, a set of characteristic solutions describing the characteristic distribution entropy function of the random encryption key are obtained. The elliptic mapping random linear combination coding and chaotic encryption key allocation are carried out.

3. Encryption algorithm optimization

3.1. Random association mapping coding

On the basis of analyzing the state characteristics of privacy-protected information encryption key and designing the storage distribution, this paper optimizes the encryption technology of privacy-protected information mixed coding in multi-domain optical fiber network. In this paper, a hybrid encryption technique based on particle swarm optimization (PSO) for privacy protection information in multi-domain optical fiber networks is proposed, in which elliptic mapping random linear combination coding design and chaotic encryption key configuration are carried out. The privacy protection method of multi-domain fiber network is used to encrypt and decode steganography. The steganography algorithm is described as follows:

•RkeyGen (param, rsk_{ID
_i}, ID_i, ID_j). Selection of random coding key $k_{i}, l_{i} \in Z_{q}^{*}$ , for privacy protection information of multi-domain optical networks based on public key mechanism definition of integer γ, with r-bit frequency within block and arithmetic coding of privacy protection information for multi-domain optical networks is $σ_{i}^{(b)} = χ_{i}^{(b)} - δ_{i}^{(b)}$ , Computation of mixed coded encryption of privacy protection information in multi-domain optical networks the public key $δ_{i}^{(b)} = {[χ_{i}^{(b)}]}_{π} + ξ_{i}^{(b)} \cdot π + {CRT}_{p_{m, n}, 1 \leq m, n \leq μ} (2 r_{i, m, n}^{″ (b)} + s_{m, n, i}^{(b)})$ , private key $sk = {({\vec{s}}_{i, j}^{(0)}, {\vec{s}}_{i, j}^{(1)})}_{1 \leq i, j \leq μ}$ , each public key extended ciphertext $c = (c^{*}, \vec{z})$ , encryption of the trusted domain x > (y₁, …, y_n), privacy protection information mixed coded encryption link layer key rk_ij, makes t₀ = H₁ (g, g₁, g₂, g₃, h), the output of random association map encoding is obtained as: $\begin{array}{l} (r k_{1 i j}, r k_{2 i j}, r k_{3 i j}, r k_{4 i j}, r k_{5 i j}, r k_{6 i j}) = \\ (g^{x_{i} k_{i}}, {(g^{t_{0}} h)}^{x_{i} k_{i}}, \frac{x_{j}}{x_{i}}, s r_{i}^{x_{i}^{- 1} (t_{0} - t_{i})} s r_{j}^{x_{i}^{- 1} (t_{j} - t_{0})}, k, g^{k_{i}}) \end{array}$ (8)

Calculate the flag sequence BLOCK_1M, BLOCK_2M, BLOCK_3M, …, BLOCK_RM, for each set of information to get elliptic curve steganography output: $f (x) = {\begin{matrix} x / P_{1}, & x \in I_{1} \\ (x - P_{1}) / P_{2}, & x \in I_{2} \\ \dots \dots & \dots \dots \\ (x - \sum_{i = 1}^{n - 1} P_{i}) / P_{n}, & x \in I_{n} \end{matrix}$ (9)

The block feature matching method is used to decrypt the encrypted multi-domain optical fiber network privacy protection information to improve the privacy protection performance of the encrypted information.

3.2. Data encryption and privacy protection optimization

Select the first layer ciphertext of the encoding sequence $H (X) = - \sum_{i = 0}^{M} p_{i} log p_{i}$ that causes entropy-valued s = { s_i, i = 1 … M|s_i ∈ S } , multi-domain optical network privacy protection information to: $\sum_{i = 1}^{n} P_{i} = 1$ (10) $I_{1} = [0, P_{1}]$ (11) $I_{i} = [\sum_{j = 1}^{i - 1} P_{j}, \sum_{j = 1}^{i} P_{j}], i = 2, 3, \dots \dots, n .$ (12)

In small storage space, the self-information of privacy protection information in multi-domain optical network is - log ₂ (P (s_i)), mutual information function, and the encoding protocol of $H = - \sum_{i = 1}^{n} P_{i} {log}_{2} (P_{i})$ , in bilinear mapping coding system is as follows: ${\begin{cases} μ_{0} = (P_{01} + P_{02}) / 2 \\ μ_{1} = (P_{11} + P_{12}) / 2 \\ μ_{2} = (P_{21} + P_{22}) / 2 \\ \dots \dots \\ μ_{L} = (P_{L 1} + P_{L 2}) / 2 \end{cases}$ (13)

Where $μ = 3.57 + \frac{1}{L} \sum_{i = 0}^{L} μ_{i}$ (14)

Under the steganography of information mixed coded encryption and decoding, the public key of chaotic encryption for privacy protection in multi-domain optical fiber networks is as follows: $\begin{matrix} {\dot{x}}_{1} = - 0.2 x_{2} \\ {\dot{x}}_{2} = x_{1} + x_{3} \\ {\dot{x}}_{3} = x_{1} + x_{2}^{2} - x_{3} \end{matrix}$ (15)

Given that the data encryption and key construction protocol is ${x^{'}}_{i} = {q^{'}}_{i} p + {r^{'}}_{i}$ , the public key encryption output is: $\begin{matrix} H_{1} : F_{q} \times G_{1} \to {0, 1}^{n}, H_{2} : {0, 1}^{*} \to G \\ H_{3} : {0, 1}^{*} \times {0, 1}^{*} \to F_{q}, H_{4} : {0, 1}^{n} \to {0, 1}^{n} \end{matrix}$ (16)

Set c_k = Encrypt (pk, m_k [i, j]) _{1≤i, j≤μ, 1≤k≤t}, for all 1 ≤ i, j ≤ μ, multidomain optical network privacy protection information mixed encoding encryption is: $\begin{matrix} {\dot{y}}_{1} = - 0.2 y_{2} \\ {\dot{y}}_{2} = y_{1} + y_{3} \\ {\dot{y}}_{3} = y_{1} + y_{2}^{2} - y_{3} \end{matrix}$ (17)

According to the optimization design of the above algorithm, the hybrid coded encryption steganography output of privacy protection information in multi-domain optical network is obtained as follows: $\begin{matrix} {CT}_{{ID}_{i}} = (C_{1} = {upk}_{i 1}^{r}, \\ C_{2} = {upk}_{i 2}^{r}, \\ C_{3} = me (g_{1}, g_{2})^{r} e (g_{1}, g^{u_{i} (H_{1} ({ID}_{i}, {upk}_{i}) - H_{1} (g, g_{1}, g_{2}, g_{3}, h))})^{r}, \\ C_{4} = Te (g_{1}, g_{2})^{r} e (g_{1}, g^{u_{i} (H_{1} ({ID}_{i}, {upk}_{i}) - H_{1} (g, g_{1}, g_{2}, g_{3}, h))})^{r}, \\ C_{5} = 1) \end{matrix}$ (18)

Based on the above analysis, a hybrid coded steganography and secure storage and transmission of privacy-protected information in multi-domain optical fiber networks is implemented in bilinear mapping coding system [12 –16].

4. Experimental test and analysis

In order to verify the performance of this method in implementing hybrid coding encryption of privacy protection information in multi-domain optical network, simulation experiments are carried out. The initial block length of privacy protection information in multi-domain optical network is n = 8. The number of layers of privacy protection information encryption is set to F = 1035, and when M ≤ M_max, the first block ciphertext ${BLOCK}_{iM} = ({block}_{i 1}, {block}_{i 2}, {block}_{i 3}, \dots, {block}_{i ⌊ \frac{{Len}_{i}}{M} ⌋})$ is set to sample the data of privacy protection information in multi-domain optical fiber network with a time length of 2.5 s and a data sampling frequency of 150 kHz. The privacy protection information for the multi-domain optical network to be encrypted is shown in Fig. 2.

Fig. 2.

Privacy protection information for multi-domain optical networks to be encrypted.

Taking the data in Fig. 2 as the test object, the data protection accuracy of using different methods to encrypt the privacy protection information under different attack intensity is compared as shown in Fig. 3.

Fig. 3.

Performance comparison of privacy protection for data encryption.

Based on the analysis of the above test results, it is found that the privacy protection and the accuracy of encryption output are better when using this method to encrypt the privacy protection information of multi-domain optical fiber network. The comparison of the time cost of test data encryption can be found in Table 1. The results of Table 1 show that the proposed method takes a short time to encrypt the privacy-protected information in multi-domain optical network and the real-time performance of encryption and decryption is better.

Table 1

Time performance comparison of encryption

	Conventional method		Proposed method
	Encryption	Deciphering	Encryption	Deciphering
Group 1	1.46	1.67	4.63	5.06
Group 2	2.54	2.87	6.56	9.54
Group 3	2.56	2.54	5.32	8.42
Group 4	2.34	3.63	5.45	8.04
Group 5	2.56	2.04	8.56	9.26

5. Conclusion

In this paper, a hybrid coding and secure encryption technique based on particle swarm optimization (PSO) for privacy protection information in multi-domain optical network is proposed. The coding mapping equation of privacy protection information security encryption in multi-domain optical network is constructed, and the privacy protection information of multi-domain fiber network is loaded into the coding mapping equation of security encryption of privacy protection information in multi-domain fiber network. A set of characteristic solutions describing the entropy function of the characteristic distribution of random encryption keys are obtained, and the elliptic mapping random linear combination coding and chaotic encryption key allocation are carried out. The privacy protection method of multi-domain optical fiber network is used to encrypt and decode information with mixed coding and steganography. Under the bilinear mapping coding system, the privacy-protected information in multi-domain optical network is encrypted and encrypted, stored and transmitted confidently. The simulation results show that this encryption technique has better steganography performance and better secure transmission and storage performance for the privacy protection information mixed encoding encryption in multi-domain optical network. The method presented in this paper has a good application value in the secure encryption of optical fiber network. A personalized system can be applied with more secure feature for individual privacy and security [13].

Footnotes

Acknowledgments

This project is supported by “Chunhui” project of Ministry of education, S2016038, Preliminary application of big data on intelligent agriculture platform of Internet of things.

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