Improved Meet-in-the-Middle Attacks on Crypton and mCrypton

( Jingyi Cui ),( Jiansheng Guo ),( Yanyan Huang ),( Yipeng Liu ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.5

Crypton is a SP-network block cipher that attracts much attention because of its excellent performance on hardware. Based on Crypton, mCrypton is designed as a lightweight block cipher suitable for Internet of Things (IoT) and Radio Frequency Identification (RFID). The security of Crypton and mCrypton under meet-in-the-middle attack is analyzed in this paper. By analyzing the differential properties of cell permutation, several differential characteristics are introduced to construct generalized δ-sets. With the usage of a generalized δ-set and differential enumeration technique, a 6-round meet-in-the-middle distinguisher is proposed to give the first meet-in-the-middle attack on 9-round Crypton-192 and some improvements on the cryptanalysis of 10-round Crypton-256 are given. Combined with the properties of nibble permutation and substitution, an improved meet-in-the-middle attack on 8-round mCrypton is proposed and the first complete attack on 9-round mCrypton-96 is proposed.

A Strategic Study on the Development of Contemporary Chinese Feminist Films from Freud's “Three Essays on Sexology”

JinYan Guo,Yu Gao,Jingyi Zhao KOREA INSTITUTE FOR HUMANITIES AND SOCIAL SCIENCES 2024 Journal of Arts and Cultural Studies(ACS) Vol.3 No.1

With the rapid development of the social economy, women’s status is gradually improving. Many feminist films are entering the film market. It has becomea new hot topic recently. The development of feminist film theory can be traced back to the 1960s. The scholars began to pay attention to the presentation of women in films and the ideology of gender narrative in films. At the same time, its development trend rapidly expanded globally with the rise of the first feminist movement. In this process, feminist ideas also began to influence the film industry, gradually making female characters and themes important film components. Purpose: Feminist film theory is an important genre of contemporary film theory, originating in the 1960s. It is a theoretical school that integrates various theories and methods, such as psychoanalysis, post-structuralism, and semiotics, for comprehensive research. This article explores how feminist films should avoid existing problems and continue to develop based on Freud's theory of sexual development trends in his " Three Essays on the Theory of Sexuality ". Methods: This article adopts methods such as literature review, comparative research, and case analysis to explore the future development trends of feminist films from multiple perspectives. Results: This article explored and analyzed the development process of feminism as portrayed in Freud's " Three Essays on the Theory of Sexuality " and Laura Mulvey's feminist film theory from multiple aspects and proposed its future development strategies. Conclusion: In recent years, feminist films have been continuously developed and show diversified themes and genres. However, feminist films, both domestically and internationally, have not yet formed a complete system and corresponding theories. For example, their in-depth exploration of the core theme and innovation in films’ content and themes needs development. Therefore, in response to such issues, the future development measures for feminist films are as follows: 1. Increase the proportion of female directors; 2. Increase the diversity of female characters; 3. Pay attention to women's issues and conduct in-depth exploration; 4. Enhance the innovation of its localized story; 5. Strengthen international cooperation; 6. Provide National policy support.

Composite Nanofibers by Growing Polypyrrole on the Surface of Polyaniline Nanofibers Formed under Free Melting Condition and Shell-Thickness-Dependent Capacitive Properties

Banglei Liang,Yaqi Zhao,Xinxin Guo,Zhenxin Zhao,Qiao Feng,Jingyi Guo,Xiaoyuan Zhang,Jinyu Tian 한국섬유공학회 2020 Fibers and polymers Vol.21 No.8

An efficient approach was presented to prepare polyaniline/polypyrrole (PANi/PPy) composite nanofibers bygrowing PPy layers on the surface of PANi nanofibrous seeds as electrode materials for supercapacitors in neutral electrolyte. Core layer of PANi nanofiber was firstly synthesized by the chemical oxidative polymerization of aniline monomers underfree melting condition of reaction solutions in fully aqueous system without the assistance of any templates or organicsolvents. Then the shell layer of PPy was fabricated by in-situ chemical oxidative polymerization of pyrrole monomers withthe above-mentioned PANi nanofiber as a seed, and the PPy shell layer thicknesses were tuned by changing the molar ratio ofaniline to pyrrole. The resulting PANi/PPy composites were investigated by field-emission scanning electron microscopy,ultraviolet-visible spectroscopy, Fourier transform infrared and Raman spectrometry. Furthermore, electrochemical behaviorsin Na2SO4 electrolyte were tested by cyclic voltammetry, galvanostatic charge-discharge techniques and electrochemicalimpedance spectroscopy. It turned out that low molar ratio of aniline to pyrrole is helpful to increase the PPy shell layerthicknesses, yield and conductivity of PANi/PPy composite nanofibers. A great improvement on the capacitive propertiescould be achieved by choosing appropriate PPy shell layer thickness. The results showed that benefiting from strong synergyeffect and π-π interaction between PANi core and PPy shell layer as well as low electrochemical impedance, PANi/PPycomposite nanofibers prepared with the molar ratio of 1:1 (PPy shell layer thickness of about 12.5 nm) displayed the highestspecific capacitance of 1550.2 F g-1 at scan rate of 5 mV s-1 and 758.8 F g-1 at the current density of 1 A g-1 with the bestcycling stability of 70.3 % after 500 cycles in 0.5 M Na2SO4 electrolyte, which exhibited a great potential in the developmentof high-performance electrode materials operated in environmentally friendly electrolyte.

Updated Bayesian Network Meta-Analysis of Adjuvant Targeted Treatment Regimens for Early Human Epidermal Growth Factor Receptor-2 Positive Breast Cancer

Xinyan Li,Litong Yao,Mozhi Wang,Mengshen Wang,Xiang Li,Xueting Yu,Jingyi Guo,Haoran Dong,Xiangyu Sun,Yingying Xu 한국유방암학회 2020 Journal of breast cancer Vol.23 No.4

Purpose: Combining targeted agents with adjuvant chemotherapy prolongs survival in human epidermal growth factor receptor 2 (HER2)-positive breast cancer patients, but also increases the risk of adverse effects. The updated results of 3 randomized controlled trials (RCTs) were reported in 2019. Given the lack of adequate head-to-head pairwise assessment for anti-HER2 agents, network meta-analysis facilitates obtaining more precise inference for evidence-based therapy. Methods: RCTs comparing at least 2 anti-HER2 regimens in an adjuvant setting for HER2- positive early-stage breast cancer (EBC) were included. Hazard ratios for overall survival (OS) and disease free survival (DFS), with respective 95% confidence intervals were pooled for assessment of efficacy. A Bayesian statistical model was used, and odds ratios (ORs) for adverse events (AEs) were used to pool effect sizes. Results: We demonstrated that 1-year trastuzumab plus chemotherapy had increased efficacy compared to shorter or longer treatment duration. The OR of cardiac events gradually increased from 6 months to 1 and 2-year trastuzumab arms, relative to chemotherapy only. Compared to trastuzumab plus chemotherapy, dual HER2-targeting therapies increased DFS, especially for hormone receptor negative patients. Dual anti-HER2 blockade regimens revealed an increased probability of gastrointestinal reactions. As a second agent, pertuzumab showed significantly higher DFS and OS. Conclusion: We conclude that 1-year adjuvant trastuzumab should remain as the standard treatment for HER2-positive EBC patients, as it has greater efficacy and a manageable proportion of AEs. Clinical efficacy can be increased for hormone receptor-negative tumors by including a second HER2-targeted agent to the treatment regimen. For hormone receptor-positive cases with basal disease, it is acceptable to reduce the risk of cardiotoxicity by shortening the duration of trastuzumab.

Predictive and Prognostic Roles of Pathological Indicators for Patients with Breast Cancer on Neoadjuvant Chemotherapy

Xinyan Li,Mozhi Wang,Mengshen Wang,Xueting Yu,Jingyi Guo,Tie Sun,Litong Yao,Qiang Zhang,Yingying Xu 한국유방암학회 2019 Journal of breast cancer Vol.22 No.4

Currently, neoadjuvant chemotherapy is a standard therapeutic strategy for breast cancer, as it can provide timely and individualized chemo-sensitivity information and is beneficial for custom-designing subsequent treatment strategies. To accurately select candidates for neoadjuvant chemotherapy, the association between various immunohistochemical biomarkers of primary disease and tumor response to neoadjuvant chemotherapy has been investigated, and results have shown that certain pathological indicators evaluated after neoadjuvant chemotherapy are associated with long-term prognosis. The Food and Drug Administration (FDA) has recommended that complete pathological response can be used as a surrogate endpoint for neoadjuvant chemotherapy, which is related to better prognosis. Considering that residual tumor persists in the majority of patients after neoadjuvant chemotherapy, the value of various pathological indicators of residual disease in predicting the long-term outcomes is being extensively investigated. This review summarizes and compares various predictive and prognostic indicators for patients who have received neoadjuvant chemotherapy, and analyzes their efficacy in different breast cancer subtypes.