单一共享广播信道,如果两个或者两个以上结点同时传输,会互相干扰(interference) 冲突(collision):结点同时接收到两个或者多个信号→接收失败! MAC协议采用分布式算法决定结点如何共享信道,即决策结点何时可以传输数据. 其必须基于信道本身,通信信道共享协调信息.无带外信道用于协调. 信道划分(channel partitioning)MAC协议 TDMA: time division multiple access TDM 将时间划分为时间帧(timeframe),并进一步划…

Systems and methods are provided to manage risk associated with access to information within a given organization. The overall risk tolerance for the organization is determined and allocated among a plurality of subjects within the organization. Allo…

档 ID 420787.1 White Paper Oracle Applications Multiple Organizations Access Control for Custom Code Checked for relevance on 12-JAN-2011 See Change Record This document discusses how to update the customization code that is affected by the access con…

A computing system is operable to contain a security module within an operating system. This security module may then act to monitor access requests by a web browser and apply mandatory access control security policies to such requests. It will be ap…

A Mandatory Access Control (MAC) aware firewall includes an extended rule set for MAC attributes, such as a security label or path. Application labels may be used to identify processes and perform firewall rule-checking. The firewall rule set may inc…

A trusted computer system that offers Linux® compatibility and supports contemporary hardware speeds. It is designed to require no porting of common applications which run on Linux, to be easy to develop for, and to allow the use of a wide variety of…

Enabling discretionary data access control in a cloud computing environment can begin with the obtainment of a data request and response message by an access manager service. The response message can be generated by a data storage service in response…

Firefox 3.5 implements the W3C Access Control specification.  As a result, Firefox 3.5 sends specific HTTP headers for cross-site requests initiated from withinXMLHttpRequest (which in Firefox 3.5 and beyond can be used to invoke different domains) a…

A role-based access control (RBAC) modeling and auditing system is described that enables a user to access and/or create security roles that can be applied to users of a first software application. When a security role having a particular set of perm…

1. INTRODUCTION   The main goal of the National Computer Security Center is to encourage the widespread availability of trusted computer systems. In support of that goal a metric was created, the Department of Defense Trusted Computer System Evaluati…