US 12,438,715 B2
Preventing access of removed users to messages shared in a group chat
Cesar Augusto Rodriguez Bravo, Alajuela (CR); and David Alonso Campos Batista, Aurora (CR)
Assigned to Kyndryl, Inc., New York, NY (US)
Filed by Kyndryl, Inc., New York, NY (US)
Filed on Jul. 24, 2023, as Appl. No. 18/357,196.
Prior Publication US 2025/0038973 A1, Jan. 30, 2025
Int. Cl. H04L 9/08 (2006.01); G06F 21/62 (2013.01); H04L 9/40 (2022.01)
CPC H04L 9/0891 (2013.01) [G06F 21/6218 (2013.01); H04L 63/101 (2013.01); G06F 2221/2141 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A computer-implemented method comprising:
in response to creation of a group comprising members for communicating using encryption keys, receiving a request to remove a given member of the members from the group for the communicating, the given member being associated with a computer system, at least one message of the group being accessible to the given member;
identifying the encryption keys associated with the given member;
causing a deletion on the computer system of the encryption keys associated with the given member in response to the request; and
confirming the deletion of the encryption keys on the computer system associated with the given member, wherein the deletion of the encryption keys on the computer system associated with the given member prevents access of the computer system to the at least one message of the group;
wherein confirming the deletion of the encryption keys on the computer system associated with the given member comprises:
comparing a first version of the at least one message prior to the request to a second version of the at least one message subsequent to the request; and
in response to determining that the first version and the second version are different, confirming that the deletion of the encryption keys on the computer system prevents the access of the computer system to the at least one message of the group.