US 12,388,638 B2
Method and apparatus for providing secure messaging service
Seung Min Yeo, Seoul (KR); Ji Min Son, Seoul (KR); Da Hye Wi, Seoul (KR); Do Yeon Koo, Seoul (KR); and Dae Yeoul Lee, Seoul (KR)
Assigned to SAMSUNG SDS CO., LTD., Seoul (KR)
Filed by SAMSUNG SDS CO., LTD., Seoul (KR)
Filed on May 22, 2023, as Appl. No. 18/200,203.
Claims priority of application No. 10-2022-0064771 (KR), filed on May 26, 2022; and application No. 10-2022-0080348 (KR), filed on Jun. 30, 2022.
Prior Publication US 2023/0388112 A1, Nov. 30, 2023
Int. Cl. H04L 9/08 (2006.01); H04L 9/30 (2006.01)
CPC H04L 9/088 (2013.01) [H04L 9/30 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method performed by a computing system for transmitting and receiving a secure message, the method comprising:
inquiring a public key of a counterpart user to be invited to a chat room;
transmitting a chat room invitation message to a terminal of the counterpart user, the chat room invitation message requesting the counterpart user to enter an invitation approval password upon invitation approval;
receiving, from the terminal of the counterpart user, an approval response to the chat room invitation message, the approval response including the invitation approval password that is encrypted using the public key of the counterpart user;
generating an encryption key related to the chat room using a public key of a counterpart user who transmitted the approval response among the inquired public key, the invitation approval password, and a private key of a chat room opening user; and
transmitting the encryption key to be delivered to the terminal of the counterpart user.