Abstract: A security protection method and device based on industrial Internet is provided. The disclosure relates to the technical field of network security and realize the isolation between the Internet and the industrial Internet platform intranet by deploying the exit firewall, and there is no restriction from the industrial Internet platform intranet to the Internet, and only necessary ports are opened from the Internet to the industrial Internet platform intranet. By deploying a regional firewall, isolation between the intranet core server and each of the secondary nodes is realized. The regional firewall is deployed on the wide area network router, and the second access policy of secondary nodes and intranet core servers is preset. After the second access policy is formulated, only the IP and service ports of specific hosts are opened, and all other accesses are prohibited.

Abstract: The disclosure provides a security analysis method and system based on protocol state, which relates to the technical field of protocol security protection. The method includes the following: a node traversal table is built, the node traversal table is scanned and analyzed according to the protocol trigger sequence rule, a first security evaluation factor of a protocol stack is determined, and a second security evaluation factor of each protocol is determined based on protocol normal application rule, and the trustworthiness degree of the second security factor is determined based on the first security factor, and the second security factor is revised based on the trustworthiness degree, and the security state of the protocol is determined according to the revised second security factor, thus the analysis of the protocol state is realized, and the security of the protocol can be accurately determined.

Abstract: The disclosure provides a security analysis method and system based on protocol state, which relates to the technical field of protocol security protection. The method includes the following: a node traversal table is built, the node traversal table is scanned and analyzed according to the protocol trigger sequence rule, a first security evaluation factor of a protocol stack is determined, and a second security evaluation factor of each protocol is determined based on protocol normal application rule, and the trustworthiness degree of the second security factor is determined based on the first security factor, and the second security factor is revised based on the trustworthiness degree, and the security state of the protocol is determined according to the revised second security factor, thus the analysis of the protocol state is realized, and the security of the protocol can be accurately determined.

Abstract: A security protection method and device based on industrial Internet is provided. The disclosure relates to the technical field of network security and realize the isolation between the Internet and the industrial Internet platform intranet by deploying the exit firewall, and there is no restriction from the industrial Internet platform intranet to the Internet, and only necessary ports are opened from the Internet to the industrial Internet platform intranet. By deploying a regional firewall, isolation between the intranet core server and each of the secondary nodes is realized. The regional firewall is deployed on the wide area network router, and the second access policy of secondary nodes and intranet core servers is preset. After the second access policy is formulated, only the IP and service ports of specific hosts are opened, and all other accesses are prohibited.

Abstract: Methods and systems are described herein for a malware detection system that detects whether an on-chain program associated with a cryptographic token is malicious based on output of a machine learning model. The malware detection system may retrieve or generate attributes associated with an on-chain program and input those into a plurality of scripts within a malware detection script database to determine whether the on-chain program is malicious. The scripts may be generated based on an output of a machine learning model indicating whether the on-chain program is malicious.

Abstract: Methods and systems are described herein for a malware detection system that detects whether an on-chain program associated with a cryptographic token is malicious based on output of a machine learning model. The malware detection system may retrieve or generate attributes associated with an on-chain program and input those into a plurality of scripts within a malware detection script database to determine whether the on-chain program is malicious. The scripts may be generated based on an output of a machine learning model indicating whether the on-chain program is malicious.

Abstract: In some aspects, a computing system may use time series data and machine learning to determine an efficient time to send data to a blockchain. A machine learning model may use a variety of blockchain related data to predict a network usage costs for different times in the future. The predicted network usage costs may be used to determine when data should be sent for storing on the blockchain to reduce network resource costs for a computing system. For example, based on inputting the blockchain data into the machine learning model, a computing system may generate output indicating network usage costs for a future time period, with each network usage cost corresponding to a timestamp within the future time period. The computing system may determine a minimum network usage cost of the network usage costs and send data to a node in the blockchain network at the corresponding timestamp.

Abstract: The present disclosure provides a technical solution related to tagging user behavior data. The processing device and method may determine and tag user behavior data according to an application to which the user behavior data belong based on analysis on an inheritance relationship between tasks associated with the user behavior data, so as to facilitate selectively deleting the user behavior data later.

Abstract: The present disclosure provides a technical solution related to tagging user behavior data. The processing device and method may determine and tag user behavior data according to an application to which the user behavior data belong based on analysis on an inheritance relationship between tasks associated with the user behavior data, so as to facilitate selectively deleting the user behavior data later.

Abstract: An absorbable iron-based alloy implantable medical device, including an iron-based alloy substrate and a degradable polymer coating and a zinc-containing protector which are arranged on the surface of the iron-based alloy substrate. The zinc-containing protector is selected from zinc and/or a zinc alloy, or a mixture of zinc and/or a zinc alloy and a degradable binder. The weight percentage of the zinc and/or zinc alloy in the mixture is greater than or equal to 20% and less than 100%. The zinc-containing protector is capable of delaying the corrosion of the iron-based alloy substrate during the early stage of implantation, such that the iron-based alloy substrate essentially avoids corrosion during the early stage of implantation and the clinical mechanical property requirements for the device in the early stage of implantation can be satisfied.

Abstract: An implantable drug-loaded device, including a zinc-containing matrix and an active drug layer attached to the zinc-containing matrix. In the zinc-containing matrix per unit area, the content of an active drug is ? (?g·mm?2). The content of zinc corroded from the zinc-containing matrix per unit area in a guaranteed grade acetic acid aqueous solution at 8.3 vol % within unit time is p (?g·mm?2·min?1). The value of ? and the value of p satisfy the following relation: 0.1?15p+??3.5, where p is greater than or equal to 0.005 and less than or equal to 0.14. The zinc release rate of the implantable drug-loaded device is matched with the content of the active drug, so after the implantable drug-loaded device is implanted into a body, the zinc and the drug work synergistically to effectively inhibit smooth muscle cell proliferation, and cannot kill cells and cause necrosis in tissues.

Abstract: Provided are an iron-based absorbable and implantable medical device and manufacturing method thereof. The iron-based absorbable and implantable medical device (1) comprises a substrate (11), a degradable polymer layer (12), and an anionic surfactant layer (13) located between the substrate (11) and the degradable polymer layer (12). The anionic surfactant, by using the hydrophobicity thereof, can form a hydrophobic barrier layer in a solution to isolate a surface of the iron-based substrate (11) from a body fluid environment, thereby avoiding direct contact with an acidic environment resulting from degradation of the degradable polymer layer (12) at the initial and early stages of implantation, thus preventing severe local corrosion of the iron-based substrate (11).

Abstract: An absorbable iron-based alloy implantable medical device, including an iron-based alloy substrate and a degradable polymer coating and a zinc-containing protector which are arranged on the surface of the iron-based alloy substrate. The zinc-containing protector is selected from zinc and/or a zinc alloy, or a mixture of zinc and/or a zinc alloy and a degradable binder. The weight percentage of the zinc and/or zinc alloy in the mixture is greater than or equal to 20% and less than 100%. The zinc-containing protector is capable of delaying the corrosion of the iron-based alloy substrate during the early stage of implantation, such that the iron-based alloy substrate essentially avoids corrosion during the early stage of implantation and the clinical mechanical property requirements for the device in the early stage of implantation can be satisfied.

Abstract: Absorbable iron-based alloy implanted medical device and manufacturing method thereof. The iron-based alloy implanted medical device comprises an iron-based alloy substrate (11), a degradable polymer layer (13) disposed on a surface of the iron-based alloy substrate (11), and a tannic acid chemical conversion film (12) disposed on a surface of the iron-based alloy substrate (11). After the medical device is implanted into a body, the tannic acid chemical conversion film (12) is configured to protect the iron-based alloy substrate (11) coated thereby from being in contact with a body fluid, thereby ensuring that the device meets a clinical mechanical property requirement in the early stage of implantation. Furthermore, the iron-based alloy implanted medical device has a decreased size, and produces a decreased amount of a corrosive product after being implanted, facilitating faster absorption or elimination of the corrosive product.

Abstract: Provided are an iron-based absorbable and implantable medical device and manufacturing method thereof. The iron-based absorbable and implantable medical device (1) comprises a substrate (11), a degradable polymer layer (12), and an anionic surfactant layer (13) located between the substrate (11) and the degradable polymer layer (12). The anionic surfactant, by using the hydrophobicity thereof, can form a hydrophobic barrier layer in a solution to isolate a surface of the iron-based substrate (11) from a body fluid environment, thereby avoiding direct contact with an acidic environment resulting from degradation of the degradable polymer layer (12) at the initial and early stages of implantation, thus preventing severe local corrosion of the iron-based substrate (11).

Abstract: Absorbable iron-based alloy implanted medical device and manufacturing method thereof. The iron-based alloy implanted medical device comprises an iron-based alloy substrate (11), a degradable polymer layer (13) disposed on a surface of the iron-based alloy substrate (11), and a tannic acid chemical conversion film (12) disposed on a surface of the iron-based alloy substrate (11). After the medical device is implanted into a body, the tannic acid chemical conversion film (12) is configured to protect the iron-based alloy substrate (11) coated thereby from being in contact with a body fluid, thereby ensuring that the device meets a clinical mechanical property requirement in the early stage of implantation. Furthermore, the iron-based alloy implanted medical device has a decreased size, and produces a decreased amount of a corrosive product after being implanted, facilitating faster absorption or elimination of the corrosive product.

Abstract: Disclosed is a manufacturing method of an iron-based alloy medical apparatus, comprising: nitriding the iron-based alloy preformed unit at 350-550° C. for 30-100 minutes; and ion etching the iron-based alloy preformed unit with an ion etching time of 80-110% of the nitriding time. Ion nitriding and ion etching can be performed in situ in the same equipment using this manufacture method with high production efficiency, and in the ion nitriding and ion etching process, nitrogen atoms continuously permeate the preformed unit, making the time it takes for the medical apparatus to be absorbed by the human body and both the hardness and strength of the instrument surface achieve requirements.

Abstract: Disclosed is a manufacturing method of an iron-based alloy medical apparatus, comprising: nitriding the iron-based alloy preformed unit at 350-550° C. for 30 100 minutes; and ion etching the iron-based alloy preformed unit with an ion etching time of 80-110% of the nitriding time, Ion nitriding and ion etching can be performed in situ in the same equipment using this manufacture method with high production efficiency, and in the ion nitriding and ion etching process, nitrogen atoms continuously permeate the preformed unit, making the time it takes for he medical apparatus to be absorbed by the human body and both the hardness and strength of the instrument surface achieve requirements.