US 12,081,592 B2
Secure overlay multicast
Thomas R. Halford, Colorado Springs, CO (US)
Assigned to Caliola Engineering, LLC, Colorado Springs, CO (US)
Filed by Caliola Engineering, LLC, Colorado Springs, CO (US)
Filed on Apr. 24, 2023, as Appl. No. 18/305,930.
Application 18/305,930 is a continuation of application No. 16/892,883, filed on Jun. 4, 2020, granted, now 11,671,452.
Claims priority of provisional application 62/949,822, filed on Dec. 18, 2019.
Prior Publication US 2023/0300172 A1, Sep. 21, 2023
Int. Cl. H04L 29/06 (2006.01); H04L 9/08 (2006.01); H04L 9/40 (2022.01)
CPC H04L 63/168 (2013.01) [H04L 9/0841 (2013.01); H04L 63/0435 (2013.01); H04L 63/0464 (2013.01); H04L 63/065 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A multicast overlay communications network, comprising:
a plurality of devices configured as an overlay network for End System Multicast (ESM) communication at the network Application Layer;
one or more groups of devices within the overlay network, each comprising a subset of the plurality of devices;
a Group Establishment message, the Group Establishment message including for one group a group Internet Protocol (IP) address and for each member of the one group a device IP address;
one or more ESM route(s), established by each device of the one group responsive to receipt of the Group Establishment message, to transmit datagrams from each device of the one of the one or more groups to every other device of the one of the one or more groups;
one or more cryptographic keys established at each device of the one group in response to receipt of the Group Establishment message and stored at the network Application Layer; and
an encryption/decryption protocol configured to encrypt/decrypt datagrams at the network Application Layer using the one or more cryptographic keys to secure communication between devices of the one of the one or more groups.