民机航电系统功能-信息安全一体化分析方法

为提高飞机在网络化环境下安全运行能力,解决现有民机航电系统功能安全性评估与信息安全分析割裂导致非预期风险产生的问题,基于民机系统安全性分析双“V”模型,以民机系统功能失效状态类别与信息安全威胁状态等级的映射关系为融合点,将信息安全风险作为系统功能异常的新致因因素,并与现有民机系统安全评估流程结合,探究一体化安全分析活动与民机航电系统研制流程的关联关系,提出机载航电系统功能-信息安全一体化分析方法。研究表明:该方法在分析关注点、风险归因等5方面存在明显差异,综合功能-信息安全对飞机、机组、乘客的影响,融合分析双“V”模型各环节功能-信息的安全性,进而有效提高航电系统功能-信息安全一体化安全性水平。

Multi-Level Cryptographic Functions for the Functionalities of Open Database System

The purpose of this paper is to design and implement a secure open database system for organizations that are increasingly opened up their information for easy access by different users. The work proposed some functionalities such as open password entry with active boxes, combined encryption methods and agent that can be incorporated into an open database system. It designed and implemented an algorithm that would not allow users to have free access into open database system. A user entering his password only needs to carefully study the sequence of codes and active boxes that describe his password and then enter these codes in place of his active boxes. The approach does not require the input code to be hidden from anyone or converted to place holder characters for security reasons. Integrating this scheme into an open database system is viable in practice in term of easy use and will improve security level of information.