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An example of such a device might be a security appliance which applies IPsec protection to communications between existing devices which themselves lack IPsec implementation protocol stack. [ 3 ] : 43 Such a device might also be called a security gateway or could be implemented as part of a network firewall to implement a tunneling protocol .
Logical security consists of software [1] safeguards for an organization's systems, including user identification and password access, authenticating, access rights and authority levels. These measures are to ensure that only authorized users are able to perform actions or access information in a network or a workstation.
Logical access controls enforce access control measures for systems, programs, processes, and information. The controls can be embedded within operating systems, applications, add-on security packages, or database and telecommunication management systems.
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]
An example of a physical security measure: a metal lock on the back of a personal computer to prevent hardware tampering. Computer security (also cybersecurity, digital security, or information technology (IT) security) is the protection of computer software, systems and networks from threats that can lead to unauthorized information disclosure, theft or damage to hardware, software, or data ...
Unidirectional network devices are typically used to guarantee information security or protection of critical digital systems, such as Industrial control systems, from cyber attacks. While use of these devices is common in high security environments such as defense, where they serve as connections between two or more networks of differing ...
Examples of a US-made set, the CDS-501, were captured in Cuba and are thought to have seen use in Central and Eastern Europe.The device operated in the upper part of the VHF band and sent high speed bursts of encrypted data from an agent to a receiving station located within a Western diplomatic facility in a hostile country to avoid interception by the adversary signals intelligence service.
An early example is the Scytale used by the Spartans. [5] The Enigma machine was an electro-mechanical system cipher machine notably used by the Germans in World War II. [citation needed] After World War II, purely electronic systems were developed. In 1987 the ABYSS (A Basic Yorktown Security System) project was initiated.