US 12,452,083 B2
Security for group communication
Göran Selander, Bromma (SE); and John Mattsson, Täby (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 16/767,685
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Nov. 30, 2018, PCT No. PCT/EP2018/083144
§ 371(c)(1), (2) Date May 28, 2020,
PCT Pub. No. WO2019/110445, PCT Pub. Date Jun. 13, 2019.
Claims priority of provisional application 62/595,638, filed on Dec. 7, 2017.
Prior Publication US 2020/0389322 A1, Dec. 10, 2020
Int. Cl. H04L 9/32 (2006.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01); H04L 9/40 (2022.01); H04L 29/06 (2006.01); H04L 65/403 (2022.01)
CPC H04L 9/3255 (2013.01) [H04L 9/0819 (2013.01); H04L 9/30 (2013.01); H04L 63/065 (2013.01); H04L 65/403 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for enabling secure group communication in a communication network, the method being performed in a sending node and comprising:
providing signature verification related information to a plurality of listening nodes, wherein the signature verification related information includes a signature with message recovery, compressed or partial signature information, and one or more of a digital signature, an indication of where or how to retrieve a signature, a public signature key, or an indication of where or how to retrieve the public signature key, wherein the signature verification related information is included in every third record, every 500 bytes, or every 30 seconds, and wherein the signature verification related information is comprised in a message field intended for other use; and
sending a group message to the plurality of listening nodes, the group message comprising the signature verification related information of the sending node.