HACCP（Hazard Analysis and Critical Control Point）即＂危害分析与关键控制点＂,是一种简便、先进的食品安全保证系统,近年来受到世界各国的重视并被食品行业广泛采用。他的最大特点是由以往的对最终产品的质量控制,转变为对各个工...HACCP（Hazard Analysis and Critical Control Point）即＂危害分析与关键控制点＂,是一种简便、先进的食品安全保证系统,近年来受到世界各国的重视并被食品行业广泛采用。他的最大特点是由以往的对最终产品的质量控制,转变为对各个工序中影响产品安全的各种因素进行分析,确定危害并进行监控、纠正,将危害预防、消除或降低到可接受水平。与传统的注重最终产品的检验相比,应用HACCP能更经济地保证食品的安全性。在绿色食品马铃薯生产中引入HACCP体系，很有必要。展开更多
The basic idea behind an ID-based cryptosystem is that end user's public key can be determined by his identity information.Comparing with the traditional certificate-based cryptography,identity-based cryptography ...The basic idea behind an ID-based cryptosystem is that end user's public key can be determined by his identity information.Comparing with the traditional certificate-based cryptography,identity-based cryptography can eliminate much of the overhead associated with the deployment and management of certificate.However,exposure of private keys can be the most devastating attack on a public key based cryptosystem since such that all security guarantees are lost.In this paper,an ID-based authenticated key agreement protocol was presented.For solving the problem of key exposure of the basic scheme,the technique of key insulation was applied and a key insulated version is developed.展开更多
In today＇ s 21st century of IT, e-commerce began to develop rapidly. Among them, in the process of e-commerce implementation, it is mainly to ensure system security issues. Based primarily on this issue, we discussed...In today＇ s 21st century of IT, e-commerce began to develop rapidly. Among them, in the process of e-commerce implementation, it is mainly to ensure system security issues. Based primarily on this issue, we discussed issues related to certification systems, SSL protocol as well as SET protocol. In addition, the article also describes the business several other safety-related technology.展开更多
As promising alternatives in building future main memory systems, emerging non-volatile memory(NVM) technologies can increase memory capacity in a cost-effective and power-efficient way. However, NVM is facing securit...As promising alternatives in building future main memory systems, emerging non-volatile memory(NVM) technologies can increase memory capacity in a cost-effective and power-efficient way. However, NVM is facing security threats due to its limited write endurance: a malicious adversary can wear out the cells and cause the NVM system to fail quickly. To address this issue, several wear-leveling schemes have been proposed to evenly distribute write traffic in a security-aware manner. In this study, we present a new type of timing attack, remapping timing attack(RTA), based on information leakage from the remapping latency difference in NVM. Our analysis and experimental results show that RTA can cause three of the latest wear-leveling schemes(i.e., region-based start-gap,security refresh, and multi-way wear leveling) to lose their effectiveness in several days(even minutes), causing failure of NVM. To defend against such an attack, we further propose a novel wear-leveling scheme called the ‘security region-based start-gap(security RBSG)', which is a two-stage strategy using a dynamic Feistel network to enhance the simple start-gap wear leveling with level-adjustable security assurance. The theoretical analysis and evaluation results show that the proposed security RBSG not only performs well when facing traditional malicious attacks, but also better defends against RTA.展开更多
文摘HACCP（Hazard Analysis and Critical Control Point）即＂危害分析与关键控制点＂,是一种简便、先进的食品安全保证系统,近年来受到世界各国的重视并被食品行业广泛采用。他的最大特点是由以往的对最终产品的质量控制,转变为对各个工序中影响产品安全的各种因素进行分析,确定危害并进行监控、纠正,将危害预防、消除或降低到可接受水平。与传统的注重最终产品的检验相比,应用HACCP能更经济地保证食品的安全性。在绿色食品马铃薯生产中引入HACCP体系，很有必要。
文摘The basic idea behind an ID-based cryptosystem is that end user's public key can be determined by his identity information.Comparing with the traditional certificate-based cryptography,identity-based cryptography can eliminate much of the overhead associated with the deployment and management of certificate.However,exposure of private keys can be the most devastating attack on a public key based cryptosystem since such that all security guarantees are lost.In this paper,an ID-based authenticated key agreement protocol was presented.For solving the problem of key exposure of the basic scheme,the technique of key insulation was applied and a key insulated version is developed.
文摘In today＇ s 21st century of IT, e-commerce began to develop rapidly. Among them, in the process of e-commerce implementation, it is mainly to ensure system security issues. Based primarily on this issue, we discussed issues related to certification systems, SSL protocol as well as SET protocol. In addition, the article also describes the business several other safety-related technology.
基金Project supported by the National High-Tech R&D Program(863)of China(Nos.2015AA015301 and 2015AA016701)the National Natural Science Foundation of China(Nos.61303046,61472153,61502190,and 61232004)+2 种基金the State Key Laboratory of Computer Architecture(No.CARCH201505)the Wuhan Applied Basic Research Project,China(No.2015010101010004)the Engineering Research Center of Data Storage Systems and Technology,Ministry of Education,China
文摘As promising alternatives in building future main memory systems, emerging non-volatile memory(NVM) technologies can increase memory capacity in a cost-effective and power-efficient way. However, NVM is facing security threats due to its limited write endurance: a malicious adversary can wear out the cells and cause the NVM system to fail quickly. To address this issue, several wear-leveling schemes have been proposed to evenly distribute write traffic in a security-aware manner. In this study, we present a new type of timing attack, remapping timing attack(RTA), based on information leakage from the remapping latency difference in NVM. Our analysis and experimental results show that RTA can cause three of the latest wear-leveling schemes(i.e., region-based start-gap,security refresh, and multi-way wear leveling) to lose their effectiveness in several days(even minutes), causing failure of NVM. To defend against such an attack, we further propose a novel wear-leveling scheme called the ‘security region-based start-gap(security RBSG)', which is a two-stage strategy using a dynamic Feistel network to enhance the simple start-gap wear leveling with level-adjustable security assurance. The theoretical analysis and evaluation results show that the proposed security RBSG not only performs well when facing traditional malicious attacks, but also better defends against RTA.
