Compound RSA 11β-Hydroxylation of %Curvularia lunata% was studied.The composition of hydroxylation products was analyzed.It was found that the conversion rate with protoplasts was increased conspicuously,the construc...Compound RSA 11β-Hydroxylation of %Curvularia lunata% was studied.The composition of hydroxylation products was analyzed.It was found that the conversion rate with protoplasts was increased conspicuously,the construction and quantity of hydroxylation products was not alteration,but the percentage was changed greatly.The 14α-OH percentage of protoplasts was 3.03 -fold than that of mycelia, the 11α-OH percentage was decreased 60%,and the conversion ratio of 11β-OH was more 1.29-fold than that of the mycelia.It affected the percentage of hydroxylation products when 2 mg/mL polyoxins were added into the mycelia conversion system.展开更多
The GB/T 27930-2015 protocol is the communication protocol between the non-vehicle-mounted charger and the battery management system (BMS) stipulated by the state. However, as the protocol adopts the way of broadcast ...The GB/T 27930-2015 protocol is the communication protocol between the non-vehicle-mounted charger and the battery management system (BMS) stipulated by the state. However, as the protocol adopts the way of broadcast communication and plaintext to transmit data, the data frame does not contain the source address and the destination address, making the Electric Vehicle (EV) vulnerable to replay attack in the charging process. In order to verify the security problems of the protocol, this paper uses 27,655 message data in the complete charging process provided by Shanghai Thaisen electric company, and analyzes these actual data frames one by one with the program written by C++. In order to enhance the security of the protocol, Rivest-Shamir-Adleman (RSA) digital signature and adding random numbers are proposed to resist replay attack. Under the experimental environment of Eclipse, the normal charging of electric vehicles, RSA digital signature and random number defense are simulated. Experimental results show that RSA digital signature cannot resist replay attack, and adding random numbers can effectively enhance the ability of EV to resist replay attack during charging.展开更多
文摘Compound RSA 11β-Hydroxylation of %Curvularia lunata% was studied.The composition of hydroxylation products was analyzed.It was found that the conversion rate with protoplasts was increased conspicuously,the construction and quantity of hydroxylation products was not alteration,but the percentage was changed greatly.The 14α-OH percentage of protoplasts was 3.03 -fold than that of mycelia, the 11α-OH percentage was decreased 60%,and the conversion ratio of 11β-OH was more 1.29-fold than that of the mycelia.It affected the percentage of hydroxylation products when 2 mg/mL polyoxins were added into the mycelia conversion system.
文摘The GB/T 27930-2015 protocol is the communication protocol between the non-vehicle-mounted charger and the battery management system (BMS) stipulated by the state. However, as the protocol adopts the way of broadcast communication and plaintext to transmit data, the data frame does not contain the source address and the destination address, making the Electric Vehicle (EV) vulnerable to replay attack in the charging process. In order to verify the security problems of the protocol, this paper uses 27,655 message data in the complete charging process provided by Shanghai Thaisen electric company, and analyzes these actual data frames one by one with the program written by C++. In order to enhance the security of the protocol, Rivest-Shamir-Adleman (RSA) digital signature and adding random numbers are proposed to resist replay attack. Under the experimental environment of Eclipse, the normal charging of electric vehicles, RSA digital signature and random number defense are simulated. Experimental results show that RSA digital signature cannot resist replay attack, and adding random numbers can effectively enhance the ability of EV to resist replay attack during charging.
