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Network security are security controls, policies, processes and practices adopted to prevent, detect and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. [1] Network security involves the authorization of access to data in a network, which is controlled by the network ...
An air gapped network (right) with no connection to a nearby internet-connected network (left) An air gap, air wall, air gapping [1] or disconnected network is a network security measure employed on one or more computers to ensure that a secure computer network is physically isolated from unsecured networks, such as the public Internet or an unsecured local area network. [2]
Network access control (NAC) is an approach to computer security that attempts to unify endpoint security technology (such as antivirus, host intrusion prevention, and vulnerability assessment), user or system authentication and network security enforcement.
Zero trust architecture (ZTA) or perimeterless security is a design and implementation strategy of IT systems.The principle is that users and devices should not be trusted by default, even if they are connected to a privileged network such as a corporate LAN and even if they were previously verified.
Secure by design, in software engineering, means that software products and capabilities have been designed to be foundationally secure.. Alternate security strategies, tactics and patterns are considered at the beginning of a software design, and the best are selected and enforced by the architecture, and they are used as guiding principles for developers. [1]
In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on configurable security rules. [ 1 ] [ 2 ] A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet , [ 3 ] or between several VLAN s.
The following are examples of commonly-deployed middleboxes: Firewalls filter traffic based on a set of predefined security rules defined by a network administrator. IP firewalls reject packets "based purely on fields in the IP and transport headers (e.g., disallow incoming traffic to certain port numbers, disallow any traffic to certain subnets etc.)" [1] Other types of firewalls may use more ...
Repudiation is unusual because it's a threat when viewed from a security perspective, and a desirable property of some privacy systems, for example, Goldberg's "Off the Record" messaging system. This is a useful demonstration of the tension that security design analysis must sometimes grapple with.