Abstract: Example embodiments herein disclose systems and methods for the secure cryptographic authentication of contactless cards by distributed entities. In an example embodiment, a distributed network authentication system can comprises a client node and a distributed ledger node in data communication with the client node, wherein the distributed ledger can contain a database storing a mapping. The client node can receive, from a client device, an authentication request, and responsive to the authentication request, transmit, to the distributed ledger node, a query. The distributed ledger node can receive, from the client node, the query, submit the query to the database, receive, from the database responsive to the query, an identification of at least one selected from the group of a validation node and a validation node address, and transmit, to the client node, the identification.

Abstract: Techniques are provided for improved fault isolation and fault reduction. A system for use with a data network includes multiple diagnostic units each adapted to communicate with the network including to a network user. A central controller is operatively connected to the diagnostic units, the controller being adapted to communicate with and coordinate operations of the diagnostic units, to instruct the diagnostic units to perform tests adapted to help isolate a network fault, and to analyze test results received from a diagnostic unit to attempt to determine the network fault. Various methods for improving fault isolation and fault reduction are also provided.

Abstract: A policy engine generates configlets that are vendor-neutral, vendor-specific or both, based on a selected target level and a selected device/device group. A translator translates and combines the configlets to form vendor-dependent configuration files. The policy engine generates the configlets using policies associated with the selected target level and its sub-target levels, as defined by a target level hierarchy. A policy includes at least a condition, and an action which the policy engine performs if the condition is true. In performing the action, the policy engine typically writes to at least a partial configlet. A policy may further include a verification clause, which is used to verify a running configuration. Policy dependencies may also be defined such that where a second policy is dependent on a first policy, the second policy must be evaluated after the first policy. This is necessary, where, for example, the first policy generates and stores a value to be used by the second policy.

Abstract: A communication bus containing master and slave devices includes a monitor unit for fault tolerant communications. In the event the master is unable to communicate, the monitor automatically assumes the master communication role. When more than one monitor is connected within the communications network, the monitor with the lowest communications address assumes the master communications role. The master includes software implementation that allows an operator to obtain data from any of the slave devices via the monitor.

Abstract: An interface monitor is connected with a LAN that is formatted with an RS-485 protocol and which is interconnected with a plurality of electrical distribution devices. The monitor includes a socket connection for receiving an RS-232 plug from a PC and software logic for interpreting between the RS-232 and RS-485 formats. The PC is enabled for communicating with each one of the electrical distribution devices.