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Research on privacy information retrieval model based on hybrid homomorphic encryption

Cybersecurity 2024年第4期7卷 52-61页

作者： Wei-tao Song Guang Zeng Wen-zheng Zhang Dian-hua Tang Science and Technology on Communication Security Laboratory.Chengdu 610041 China Zhejiang University Hangzhou 311200China PLA SSF Information Engineering University Zhengzhou 450000China College of Computer Science and Technology National University of Defense TechnologyChangsha 410073China

The computational complexity of privacy information retrieval protocols is often linearly related to database *** the database size is large,the efficiency of privacy information retrieval protocols is relatively *** paper designs an effective privacy information retrieval model based on hybrid fully homomorphic *** assignment method is cleverly used to replace a large number of homomorphic encryption *** the same time,the multiplicative homomorphic encryption scheme is first used to deal with the large-scale serialization in the search,and then the fully homomorphic encryption scheme is used to deal with the remaining simple *** depth of operations supported by the fully homomorphic scheme no longer depends on the size of the database,but only needs to support the single homomorphic encryption scheme to decrypt the circuit *** on this hybrid homomorphic encryption retrieval model,the efficiency of homomorphic privacy information retrieval model can be greatly improved.

关键词： Cryptography Hybrid homomorphic encryption Privacy protection Private information retrieval

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Analysis of a New Improved AES S-Box Structure 5th

Analysis of a New Improved AES S-Box Structure

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5th International Conference on security and Privacy in New Computing Environments, SPNCE 2022

作者： Cheng, Rong Zhou, Yu Miao, Xudong Hu, Jianyong Science and Technology on Communication Security Laboratory Chengdu610041 China

ISBN: (纸本)9783031306228

S-boxes are very important nonlinear components in symmetric ciphers and have a great role in the security of cryptographic algorithms. In algorithm design, 4-bit and 8-bit S-boxes are most commonly used. The S-box of the AES is the best 8-bit S-box in terms of nonlinearity and differential uniformity at present. However, other properties are not the best. In this paper, we improve and propose a new algebraic structure that can be used to generate S-boxes with excellent performance. The main enhanced properties of the new S-boxes are: strict avalanche criterion (SAC), distance to SAC, the bit independence criterion (BIC), algebraic complexity, inverse algebraic complexity, and periodicity. After comparing with existing S-boxes, the properties of S-boxes proposed in this paper are the best. © 2023, ICST Institute for Computer sciences, Social Informatics and Telecommunications Engineering.

关键词： Cryptography

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Differential-Linear Cryptanalsis on SIMECK32/64 and SIMON32/64 3

Differential-Linear Cryptanalsis on SIMECK32/64 and SIMON32/...

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3rd International conference on Computer, Big Data and Artificial Intelligence, ICCBDAI 2022

作者： Zhang, Feng Li, Feng Zhang, Wenzheng Science and Technology on Communication Security Laboratory Sichuan Chengdu610041 China

In this paper, we give differential-linear cryptanalysis of SIMON, which is a family of lightweight block ciphers published by the National security Agency, and SIMECK, which is a family of lightweight block ciphers proposed by Yang et al. Firstly, all input difference and output masks with one active bit are traversed to obtain a 9-round SIMON32/64 differential-linear distinguisher and a 10-round SIMECK32/64 differential-linear distinguisher. Then, a 12-round SIMON32/64 differential-linear distinguisher with bias 2-12.69 and a 13-round SIMECK32/64 differential-linear distinguisher with bias 2-14.03 can be obtained by searching one round of differential characteristics forward and two rounds of linear approximations backward. The dynamic key guessing technique proposed by Wang et al. has excellent advantages in the SIMON-like cipher key recovery process. Therefore, we have applied it to differential-linear cryptanalysis. Then, the 12-round SIMON32/64 differential-linear distinguisher is extended forward by four rounds and backward by four rounds to attack the 20-round SIMON32/64 with time complexity 255.68 and data complexity 228. And the 13-round SIMECk32/64 differential-linear distinguisher is extended forward by four rounds and backward by four rounds to attack the 21-round SIMECK32/64 with time complexity 250.67 and data complexity 230. These are the best differential-linear cryptanalysis results for SIMON32/64 and SIMECK32/64 in the open literature. © Published under licence by IOP Publishing Ltd.

关键词： Cryptography

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Efficient Two-Party Authentication Key Agreement Protocol Using Reconciliation Mechanism from Lattice 5th

Efficient Two-Party Authentication Key Agreement Protocol Us...

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5th International Conference on security and Privacy in New Computing Environments, SPNCE 2022

作者： Wang, Jinhua Chen, Ting Liu, Yanyan Zhou, Yu Dong, XinFeng Science and Technology on Communication Security Laboratory Sichuan Chengdu610041 China

ISBN: (纸本)9783031306228

It is crucial and challenging to design a quantum-secure and efficient authentication key agreement scheme for IoT. The reasons are that not only there are various security requirements need to meet, but also communication party is resource-constrained. Recently, a large number of 2PAKA schemes for IoT have been presented, yet most of them are subject to quantum attack. In this paper, we put forward a quantum-secure 2PAKA protocol using lattice cryptography. The proposed LB-ID-2PAKA protocol makes use of identity-based signature to avoid the complicated certificate management of PKI-based protocol. At the same time, based on the ***, we apply Peikert’s reconciliation mechanism to save the communication cost. Our LB-ID-2PAKA protocol can be resistance against various attack and provide desired security property, especially support perfect forward secrecy. Moreover, the provable security analysis shows that our LB-ID-2PAKA protocol is provably secure under RO model and the hardness assumption of MLWE. © 2023, ICST Institute for Computer sciences, Social Informatics and Telecommunications Engineering.

关键词： Authentication

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Decoy-state method for quantum-key-distribution-based quantum private query

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science China(Physics,Mechanics & Astronomy) 2022年第4期65卷 41-48页

作者： Bin Liu Shuang Xia Di Xiao Wei Huang Bingjie Xu Yang Li College of Computer Science Chongqing UniversityChongqing 400044China Science and Technology on Communication Security Laboratory Institute of Southwestern CommunicationChengdu 610041China

The quantum private query(QPQ)is a quantum solution for the symmetrically private information retrieval *** study the security of quantum-key-distribution-based QPQ with weak coherent *** result shows that multiphoton pulses have posed a serious threat to the participant’s privacy in QPQ *** we propose a decoy-state method that can help the honest participant detect the attack by exploiting multiphoton pulses and improving the key distillation process to defend against such *** analysis demonstrates that our decoy-state method significantly improves the security of the QPQ with weak coherent pulses,which solves a major obstacle in the practical application of the QPQ.

关键词： quantum private query symmetrically private information retrieval quantum key distribution decoy state weak coherent pulse

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High-speed implementation of privacy amplification for continuous-variable quantum-key distribution with Toeplitz matrix based on FPGA 10

High-speed implementation of privacy amplification for conti...

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Quantum and Nonlinear Optics X 2023

作者： Luo, Yujie Li, Yang Ma, Li Zhou, Chuang Yang, Jie Wu, Mei Zhang, Shuai Huang, Wei Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

ISBN: (纸本)9781510667990

For a high-speed and secure continuous-variable quantum key distribution (CV-QKD) system, privacy amplification (PA) plays an important role. To reduce the finite size effect, the input length of PA should be at least on the order of 10^8, 10^9, 10^10 when the transmission distance is about 50km, 80km, 100km, respectively. This leads to high computation complexity and large storage demand of the data, which is unfriendly to field programmable gate array (FPGA) implementation for its limited resource. In addition, the limited IO speed of Double Data Rate Synchronous Dynamic Random Access Memory (DDR SDRAM) restricts the implementation performance of PA. In this paper, we propose an effective way to access data based on DDR to improve the performance of PA. As a result, the reading time from DDR can be reduced, and it can eliminate the effect of the limited IO speed of DDR, so that PA can perform with multiple code-words. This can make full use of the resource of FPGA and increase the execution speed of PA. Besides, combining with the proposed method, an easier algorithm is used to decrease the complexity of calculations. Based on these methods, we realize PA with Toeplitz matrix based on FPGA and the experimental throughput is about 288Mbps when the input length is about 100Mbits. © 2023 SPIE.

关键词： Quantum cryptography

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A high-throughput and FPGA-based LDPC decoder for continuous-variable quantum key distribution system 10

A high-throughput and FPGA-based LDPC decoder for continuous...

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Quantum and Nonlinear Optics X 2023

作者： Zhou, Chuang Li, Yang Ma, Li Luo, Yujie Yang, Jie Wu, Mei Zhang, Shuai Huang, Wei Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

ISBN: (纸本)9781510667990

The throughput of error correction is one of the main bottlenecks of high-speed continuous variable quantum key distribution (CV-QKD) post-processing, which directly restricts the practical secret key rates (SKR). Implementing the decoder of low-density parity-check (LDPC) codes based on FPGA in limited precision can improve the decoding throughput significantly. In this paper, a high-throughput decoder architecture with limited precision for quasi-cyclic LDPC (QC-LDPC) codes is proposed. In particular, decoding of two typical LDPC codes, with code rates 0.2 and 0.1, for CV-QKD have been implemented on a commercial FPGA. The clock operates at 100 MHZ and the throughput of 1.44 Gbps and 0.78 Gbps is achieved, respectively, which can support 71.89 Mbps and 9.97 Mbps real-time SKR under transmission distance of 25 km and 50 km, respectively. The proposed architecture paves the way for high-rate real-time CV-QKD deployment in secure metropolitan area network. © 2023 SPIE.

关键词： Field programmable gate arrays (FPGA)

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An Orthogonal Dual-Polarization and Time Multiplexing Scheme of Continuous-Variable Quantum Key Distribution 21

An Orthogonal Dual-Polarization and Time Multiplexing Scheme...

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21st International Conference on Optical communications and Networks, ICOCN 2023

作者： Zhang, Shuai Pan, Yan Wang, Heng Shao, Yun Zhang, Tao Liu, Jinlu Pi, Yaodi Ye, Ting Huang, Wei Li, Yang Xu, Bingjie Institute of Southwestern Communication Science and Technology on Communication Security Laboratory Chengdu610041 China

ISBN: (纸本)9798350343502

In this article, we propose a time and orthogonal polarization division multiplexing scheme for local local oscillator continuous-variable quantum key distribution (LLO CV-QKD) system. According to the influence mechanism of time-domain diffusion and polarization disturbance on the key parameters, such as the channel transmittance and excess noise, of the studied system, we established a dual-polarization theoretical model and verified its validity by simulations. Here, the pulse width at the nanosecond level and polarization extinction ratio (PER) are considered for optimizing the performance of secure key rate (SIKR) quantitatively. For transmitting over 25 km optical fiber, the required PER should be above 22 dB when the pulse width is fixed to lns. Moreover, the optimal repetition frequency is obtained. In this case, 5.25 Mbps SKR can be achieved under the lns pulse width and 25dB PER, considering the 10 11 finite-size block. Our work provides a systematic and theoretical framework for the study of improving the SKR of the dual-polarization CV-QKD system. © 2023 IEEE.

关键词： Quantum cryptography

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Monitoring the source noise of a plug-and-play continuous variable quantum key distribution system 10

Monitoring the source noise of a plug-and-play continuous va...

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Quantum and Nonlinear Optics X 2023

作者： Shao, Yun Pan, Yan Wang, Heng Pi, Yaodi Ye, Ting Liu, Jinlu Li, Yang Huang, Wei Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

ISBN: (纸本)9781510667990

The source noise in plug-and-play continuous variable quantum key distribution (CV-QKD) system plays a crucial role in determining the secret key rate and transmission distance. In general, the source noise is considered untrusted and fully controlled by Eve, which is because the laser travels through the unsecure channel before being modulated. However, this may overestimate the key information stolen by Eve leading to an underestimation of the key rate share between the legal communication parties. Here, we use a beam-splitter with signal attenuation to model the source noise combined with source monitoring scheme to characterize the source imperfection in the plug-and-play CV-QKD system. We show that the performance of the plug-and-play CV-QKD can be significantly improved under the above scheme compared to the untrusted source model. Our numerical simulation results also show that the plug-and-play CV-QKD with source monitoring has a key generation rate close to that of a trusted source under the same simulation parameters. © 2023 SPIE.

关键词： Quantum cryptography

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A New Scheme for Orthogonal Dual-Polarization Continuous-Variable Quantum Key Distribution 10

A New Scheme for Orthogonal Dual-Polarization Continuous-Var...

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Quantum and Nonlinear Optics X 2023

作者： Zhang, Shuai Pan, Yan Wang, Heng Shao, Yun Zhang, Tao Liu, Jinlu Pi, Yaodi Huang, Wei Li, Yang Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

ISBN: (纸本)9781510667990

In this article, we propose a pilot alternately assisted scheme of orthogonal dual-polarization and time multiplexing for the local local oscillator continuous-variable quantum key distribution (LLO CV-QKD). Our scheme utilizes time multiplexing and dual-polarization multiplexing techniques to dramatically isolate the quantum signal from the pilot light. To analyze the influence mechanism of time-domain diffusion and polarization perturbation on the key parameters, such as the channel transmittance and excess noise, of the studied system, a general LLO excess noise model based on polarization extinction ratio (PER) and time-domain pulse extinction ratio (TER) is established. We mainly focus on the photon-leakage noise from the reference path to the quantum signal path, which is first analyzed in the dual polarization LLO regime. Furthermore, we conduct a series of simulations to verify the proposed dual polarization and time multiplexing model. Results show that it maintains a low level of excess noise and a secure key rate (SKR) of 10.25 Mbps@25km can be obtained under the finite-size effect. We achieved 0.93Mbps@25km SKR under a relatively low PER of 17 dB in the nanosecond level pulse width. Our work greatly extends the application scenarios of the dual-polarization division multiplexing CV-QKD system and provides a theoretical and representative framework for the study of improving the performance of the dual-polarization CV-QKD system. © 2023 SPIE.

关键词： Quantum cryptography

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