Abstract: An exemplary method includes a proximity detection system that accesses information associated with a virtual location marker positioned in relation to a geographic area. The information defines a location-based field of view (“LFOV”) that extends directionally from the virtual location marker. The proximity detection system further tracks a location of a mobile computing device at the geographic area and determines, based on the information associated with the virtual location marker and the location of the mobile computing device, that the mobile computing device has entered the LFOV that extends directionally from the virtual location marker.

Abstract: A multi-scheme random selection of blockchain endorsers may preserve anonymity of nodes that participate in a blockchain network, and may assign each node an endorsement load that is proportionate to the utilization of the blockchain network by that node. Selection of one or more nodes to endorse data before recordation to the blockchain may include randomly selecting an active endorser selection scheme from a set of available endorser selection schemes, and randomly selecting one or more nodes as endorsers for the data based on the active endorser selection scheme. Each scheme may be derived based on the tracked utilization over different time scales. Exit criteria may determine when to switch the active endorser selection scheme. The exit criteria may be based on a number of times each node is selected as an endorser under the active endorser selection scheme, and utilization of the blockchain network by each node.

Abstract: An exemplary method includes a proximity detection system that accesses information associated with a virtual location marker positioned in relation to a geographic area. The information defines a location-based field of view (“LFOV”) that extends directionally from the virtual location marker. The proximity detection system further tracks a location of a mobile computing device at the geographic area and determines, based on the information associated with the virtual location marker and the location of the mobile computing device, that the mobile computing device has entered the LFOV that extends directionally from the virtual location marker.

Abstract: A multi-scheme random selection of blockchain endorsers may preserve anonymity of nodes that participate in a blockchain network, and may assign each node an endorsement load that is proportionate to the utilization of the blockchain network by that node. Selection of one or more nodes to endorse data before recordation to the blockchain may include randomly selecting an active endorser selection scheme from a set of available endorser selection schemes, and randomly selecting one or more nodes as endorsers for the data based on the active endorser selection scheme. Each scheme may be derived based on the tracked utilization over different time scales. Exit criteria may determine when to switch the active endorser selection scheme. The exit criteria may be based on a number of times each node is selected as an endorser under the active endorser selection scheme, and utilization of the blockchain network by each node.

Abstract: A multi-scheme random selection of blockchain endorsers may preserve anonymity of nodes that participate in a blockchain network, and may assign each node an endorsement load that is proportionate to the utilization of the blockchain network by that node. Selection of one or more nodes to endorse data before recordation to the blockchain may include randomly selecting an active endorser selection scheme from a set of available endorser selection schemes, and randomly selecting one or more nodes as endorsers for the data based on the active endorser selection scheme. Each scheme may be derived based on the tracked utilization over different time scales. Exit criteria may determine when to switch the active endorser selection scheme. The exit criteria may be based on a number of times each node is selected as an endorser under the active endorser selection scheme, and utilization of the blockchain network by each node.

Abstract: A multi-scheme random selection of blockchain endorsers may preserve anonymity of nodes that participate in a blockchain network, and may assign each node an endorsement load that is proportionate to the utilization of the blockchain network by that node. Selection of one or more nodes to endorse data before recordation to the blockchain may include randomly selecting an active endorser selection scheme from a set of available endorser selection schemes, and randomly selecting one or more nodes as endorsers for the data based on the active endorser selection scheme. Each scheme may be derived based on the tracked utilization over different time scales. Exit criteria may determine when to switch the active endorser selection scheme. The exit criteria may be based on a number of times each node is selected as an endorser under the active endorser selection scheme, and utilization of the blockchain network by each node.