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Context-based Access Control
Context-based access control (CBAC) is a feature of firewall software, which intelligently filters TCP and UDP packets based on application layer protocol session information. It can be used for intranets, extranets and internets. CBAC can be configured to permit specified TCP and UDP traffic through a firewall only when the connection is initiated from within the network needing protection. (In other words, CBAC can inspect traffic for sessions that originate from the external network.) However, while this example discusses inspecting traffic for sessions that originate from the external network, CBAC can inspect traffic for sessions that originate from either side of the firewall. This is the basic function of a stateful inspection firewall. Without CBAC, traffic filtering is limited to access list implementations that examine packets at the network layer, or at most, the transport layer. However, CBAC examines not only network layer and transport layer information but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firewall (computing)
In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on configurable security rules. A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet or between several VLANs. Firewalls can be categorized as network-based or host-based. History The term '' firewall'' originally referred to a wall to confine a fire within a line of adjacent buildings. Later uses refer to similar structures, such as the metal sheet separating the engine compartment of a vehicle or aircraft from the passenger compartment. The term was applied in the 1980s to network technology that emerged when the Internet was fairly new in terms of its global use and connectivity. The predecessors to firewalls for network security were routers used in the 1980s. Because they already segregated networks, routers could filter packets crossing them. Before it was used in real-life comput ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attribute-based Access Control
Attribute-based access control (ABAC), also known as policy-based access control for IAM, defines an access control paradigm whereby a subject's authorization to perform a set of operations is determined by evaluating attributes associated with the subject, object, requested operations, and, in some cases, environment attributes. ABAC is a method of implementing access control policies that is highly adaptable and can be customized using a wide range of attributes, making it suitable for use in distributed or rapidly changing environments. The only limitations on the policies that can be implemented with ABAC are the capabilities of the computational language and the availability of relevant attributes. ABAC policy rules are generated as Boolean functions of the subject's attributes, the object's attributes, and the environment attributes. Unlike role-based access control (RBAC), which defines roles that carry a specific set of privileges associated with them and to which subjects ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Packets (information Technology)
Packet may refer to: * A small container or pouch ** Packet (container), a small single use container ** Cigarette packet ** Sugar packet * Network packet, a formatted unit of data carried by a packet-mode computer network * Packet radio, a form of amateur radio data communications using the AX25 protocol * Packet trade, regularly scheduled cargo, passenger, and mail trade conducted by ship * Packet boat, type of boat used for scheduled mail or passenger service * C-82 Packet, a U.S. military transport aircraft * '' Packet Newspapers'', British newspaper group See also * * * Package (other) * Pack (other) * Kit (other) * MacGuffin - A plot device in the form of some goal, desired object, or another motivator popularized in the 1930s by Alfred Hitchcock Sir Alfred Joseph Hitchcock (13 August 1899 – 29 April 1980) was an English film director. He is widely regarded as one of the most influential figures in the history of cinema. In a career ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firewall Software
In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on configurable security rules. A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet or between several VLANs. Firewalls can be categorized as network-based or host-based. History The term '' firewall'' originally referred to a wall to confine a fire within a line of adjacent buildings. Later uses refer to similar structures, such as the metal sheet separating the engine compartment of a vehicle or aircraft from the passenger compartment. The term was applied in the 1980s to network technology that emerged when the Internet was fairly new in terms of its global use and connectivity. The predecessors to firewalls for network security were routers used in the 1980s. Because they already segregated networks, routers could filter packets crossing them. Before it was used in real-life computing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Access Control
In computer security, general access control includes identification, authorization, authentication, access approval, and audit. A more narrow definition of access control would cover only access approval, whereby the system makes a decision to grant or reject an access request from an already authenticated subject, based on what the subject is authorized to access. Authentication and access control are often combined into a single operation, so that access is approved based on successful authentication, or based on an anonymous access token. Authentication methods and tokens include passwords, biometric scans, physical keys, electronic keys and devices, hidden paths, social barriers, and monitoring by humans and automated systems. Software entities In any access-control model, the entities that can perform actions on the system are called ''subjects'', and the entities representing resources to which access may need to be controlled are called ''objects'' (see also Access Contr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Risk-based Authentication
In authentication Authentication (from ''authentikos'', "real, genuine", from αὐθέντης ''authentes'', "author") is the act of proving an Logical assertion, assertion, such as the Digital identity, identity of a computer system user. In contrast with iden ..., risk-based authentication is a non-static authentication system which takes into account the profile (IP address, User-Agent HTTP header, time of access, and so on) of the agent requesting access to the system to determine the risk profile associated with that transaction. The risk profile is then used to determine the complexity of the challenge. Higher risk profiles leads to stronger challenges, whereas a static username/password may suffice for lower-risk profiles. Risk-based implementation allows the application to challenge the user for additional credentials only when the risk level is appropriate. The point is that user validation accuracy is improved without inconveniencing a user, and risk-based authenticat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capability-based Security
Capability-based security is a concept in the design of secure computing systems, one of the existing security models. A capability (known in some systems as a key) is a communicable, unforgeable token of authority. It refers to a value that references an object along with an associated set of access rights. A user program on a capability-based operating system must use a capability to access an object. Capability-based security refers to the principle of designing user programs such that they directly share capabilities with each other according to the principle of least privilege, and to the operating system infrastructure necessary to make such transactions efficient and secure. Capability-based security is to be contrasted with an approach that uses traditional UNIX permissions and access control lists. Although most operating systems implement a facility which resembles capabilities, they typically do not provide enough support to allow for the exchange of capabilitie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RSBAC
Rule-set-based access control (RSBAC) is an open source access control framework for current Linux kernels, which has been in stable production use since January 2000 (version 1.0.9a). Features * Free open source GNU General Public License ( GPL) Linux kernel security extension * Independent of governments and big companies * Several well-known and new security models, e.g. mandatory access control ( MAC), access control list ( ACL), and role compatibility (RC) * On-access virus scanning with Dazuko interface * Detailed control over individual user and program network accesses * Fully access controlled kernel level user management * Any combination of security models possible * Easily extensible: write your own model for runtime registration * Support for latest kernels * Stable for production use * Easily portable to other operating systems The RSBAC system architecture has been derived and extended from the Generalized Framework for Access Control ( GFAC) by Marshall Abrams and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Role-based Access Control
In computer systems security, role-based access control (RBAC) or role-based security is an approach to restricting system access to authorized users, and to implementing mandatory access control (MAC) or discretionary access control, discretionary access control (DAC). Role-based access control is a policy-neutral access control mechanism defined around roles and privileges. The components of RBAC such as role-permissions, user-role and role-role relationships make it simple to perform user assignments. A study by NIST has demonstrated that RBAC addresses many needs of commercial and government organizations. RBAC can be used to facilitate administration of security in large organizations with hundreds of users and thousands of permissions. Although RBAC is different from MAC and DAC access control frameworks, it can enforce these policies without any complication. Design Within an organization, role (computer science), roles are created for various job functions. The permiss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organisation-based Access Control
In computer security, organization-based access control (OrBAC) is an access control model first presented in 2003. The current approaches of the access control In physical security and information security, access control (AC) is the action of deciding whether a subject should be granted or denied access to an object (for example, a place or a resource). The act of ''accessing'' may mean consuming ... rest on the three entities (''subject'', ''action'', ''object'') to control the access the policy specifies that some subject has the permission to realize some action on some object. OrBAC allows the policy designer to define a security policy independently of the implementation. The chosen method to fulfill this goal is the introduction of an abstract level. * Subjects are abstracted into roles. A role is a set of subjects to which the same security rule apply. * Similarly, an activity is a set of actions to which the same security rule apply. * And, a view is a set of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mandatory Access Control
In computer security, mandatory access control (MAC) refers to a type of access control by which a secured environment (e.g., an operating system or a database) constrains the ability of a ''subject'' or ''initiator'' to access or modify on an ''object'' or ''target''. In the case of operating systems, the subject is a process or thread, while objects are files, directories, TCP/ UDP ports, shared memory segments, or IO devices. Subjects and objects each have a set of security attributes. Whenever a subject attempts to access an object, the operating system kernel examines these security attributes, examines the authorization rules (aka ''policy'') in place, and decides whether to grant access. A database management system, in its access control mechanism, can also apply mandatory access control; in this case, the objects are tables, views, procedures, etc. In mandatory access control, the security policy is centrally controlled by a policy administrator and is guaranteed (in p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lattice-based Access Control
In computer security, lattice-based access control (LBAC) is a complex access control model based on the interaction between any combination of objects (such as resources, computers, and applications) and subjects (such as individuals, groups or organizations). In this type of label-based mandatory access control model, a lattice (order), lattice is used to define the levels of security that an object may have and that a subject may have access to. The subject is only allowed to access an object if the security level of the subject is greater than or equal to that of the object. Mathematically, the security level access may also be expressed in terms of the lattice (a partial order set) where each object and subject have a greatest lower bound (meet) and least upper bound (join) of access rights. For example, if two subjects ''A'' and ''B'' need access to an object, the security level is defined as the meet of the levels of ''A'' and ''B''. In another example, if two object ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
